{"title":"MFactory","description":null,"products":[{"product_id":"mfactory-helical-lsd-b-series","title":"MFactory Helical Limited Slip Differential for B Series","description":"\u003cul\u003e\n\u003cli\u003eThree Fitment Variants Available \u003c\/li\u003e\n\u003cli\u003eHelical Style LSD \u003c\/li\u003e\n\u003cli\u003eForged Steel Construction \u003c\/li\u003e\n\u003cli\u003eUp to 75% Torque Transfer to One Wheel \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eMFactory Helical Limited Slip Differential - Honda\/Acura B Series\u003c\/h3\u003e\n\n\u003cp\u003eRunning a B series Integra or Civic at the track and you're spinning one wheel coming out of corners? Your open differential's sending all the power to the wheel with less traction. The MFactory helical LSD splits power between both wheels so you're actually putting power down instead of lighting up one tire. Your stock open diff sends 100% of the power to whichever wheel has less grip. That's why you're spinning the inside wheel coming out of corners. The helical LSD can transfer up to 75% of the torque to the wheel with more grip. You're getting way better corner exit traction and you're not one-wheel-pegging it everywhere.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why Open Diffs Suck for Track Use\u003c\/h4\u003e\n\n\u003cp\u003eYour stock B series diff is an open differential. When you're cornering hard and one wheel lifts or loses traction, all the power goes to that wheel. The wheel with traction gets nothing. You're spinning the inside wheel and going nowhere. An open diff works fine for street driving where you're not pushing the car, but on track it's garbage. Every time you're trying to put power down coming out of a corner, you're spinning one wheel. The MFactory helical LSD uses gear geometry to split power between both wheels based on which wheel has more traction. When one wheel starts to slip, the diff transfers torque to the other wheel automatically. No clutch packs, no preload springs, just gears doing their thing. You get predictable power delivery and way better corner exit speed.\u003c\/p\u003e\n\n\u003ch4\u003eHelical LSD vs. Clutch-Type LSD\u003c\/h4\u003e\n\n\u003cp\u003eMost aftermarket LSDs are clutch-type (like Cusco or OBX). They use clutch packs that wear out and need rebuilds every few years. You're also supposed to run special diff fluid with friction modifiers. The MFactory helical LSD uses gears instead of clutches. There's nothing to wear out and you don't need special fluids. Just run regular gear oil and forget about it. I've got 5+ years and probably 100+ track days on my MFactory diff and it still works like new. Clutch-type diffs also change your steering feel because they bind up under certain conditions. The helical diff doesn't bind, so your steering feels normal.\u003c\/p\u003e\n\n\u003ch4\u003eForged Steel, Not Cast\u003c\/h4\u003e\n\n\u003cp\u003eThe MFactory diff's made from forged Japanese SAE 4320 and SAE 9310 steel. That's way stronger than cast steel or cheap Chinese forgings. The gears are double-tempered and cryogenically treated (super sub-zero treatment) for extra toughness. MFactory also shot-peens the gears to increase surface hardness. The diff's designed to handle drag racing shock loads, so it'll survive anything you throw at it on a road course or autocross. The gear geometry's designed to minimize parasitic drivetrain losses. MFactory claims their diffs transfer 1-2% more power to the wheels than competitors' diffs. That's not a huge number, but every bit helps.\u003c\/p\u003e\n\n\u003ch4\u003eThree Variants - Make Sure You Order the Right One\u003c\/h4\u003e\n\n\u003cp\u003eMFactory makes three different B series diffs:\n\n**B16A\/B18A\/B18B** - Fits 1990-1993 Integra (B18A), 1999-2000 Civic Si (B16A2), 1994-1997 Del Sol VTEC (B16A), 1994-2001 Integra GS\/LS\/RS (B18B)\n\n**B18C1\/B18C5** - Fits 1994-2001 Integra GS-R (B18C1), 1997-2001 Integra Type R (B18C5)\n\n**B Series AWD** - Fits 1997-2001 CR-V (manual transmission). Works with standard FWD B series axles or AWD CR-V axles.\n\nThe diffs aren't interchangeable. The ring gear bolt patterns and case sizes are different. Order the correct one for your transmission or it won't fit.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMFactory helical limited slip differential\u003c\/li\u003e\n  \u003cli\u003eForged Japanese SAE 4320\/9310 steel construction\u003c\/li\u003e\n  \u003cli\u003eDouble-tempered and super sub-zero treated\u003c\/li\u003e\n  \u003cli\u003eShot-peened gears for increased surface hardness\u003c\/li\u003e\n  \u003cli\u003eUp to 75% torque transfer to one wheel\u003c\/li\u003e\n  \u003cli\u003eNo clutch packs (maintenance-free)\u003c\/li\u003e\n  \u003cli\u003eWorks with standard gear oil (no special fluids)\u003c\/li\u003e\n  \u003cli\u003eNo steering bind or adverse effects\u003c\/li\u003e\n  \u003cli\u003eLifetime globally transferable warranty\u003c\/li\u003e\n  \u003cli\u003eAvailable in three variants (see fitment below)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits Your Car (Choose Correct Variant)\u003c\/h4\u003e\n\n**B16A\/B18A\/B18B Variant:**\n\u003cul\u003e\n  \u003cli\u003e1990-1993 Acura Integra (B18A)\u003c\/li\u003e\n  \u003cli\u003e1999-2000 Honda Civic Si EM1 (B16A2)\u003c\/li\u003e\n  \u003cli\u003e1994-1997 Honda Del Sol VTEC (B16A)\u003c\/li\u003e\n  \u003cli\u003e1994-2001 Acura Integra GS\/LS\/RS (B18B)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n**B18C1\/B18C5 Variant:**\n\u003cul\u003e\n  \u003cli\u003e1994-2001 Acura Integra GS-R (B18C1)\u003c\/li\u003e\n  \u003cli\u003e1997-2001 Acura Integra Type R (B18C5)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n**B Series AWD Variant:**\n\u003cul\u003e\n  \u003cli\u003e1997-2001 Honda CR-V (manual transmission)\u003c\/li\u003e\n  \u003cli\u003eWorks with standard FWD B series axles or AWD CR-V axles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Order the correct variant for your car or it won't fit. If your B16A2 Civic Si came with a factory viscous LSD, this diff won't bolt in without changing the ring gear. Installation requires pulling your transmission and opening the diff. If you've never done diff work, get a shop to install it.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 1990-1993 Acura Integra GS\/LS\/RS\u003cdiv\u003e1994-2001 Acura Integra GS\/LS\/RS\/Special Edition\u003c\/div\u003e\n\u003cdiv\u003e1994-2001 Acura Integra GS-R\u003c\/div\u003e\n\u003cdiv\u003e1997-2001 Acura Integra Type R\u003c\/div\u003e\n\u003cdiv\u003e1999-2000 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e1994-1997 Honda Del Sol VTEC\u003c\/div\u003e\n\u003cdiv\u003e1997-2001 Honda CR-V\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Limited Slip Differential\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"MFactory","offers":[{"title":"B16A\/B18A\/B18B","offer_id":45118447812642,"sku":"MFT-TRS-05B16","price":799.95,"currency_code":"USD","in_stock":false},{"title":"B18C1\/B18C5","offer_id":45118447845410,"sku":"MFT-TRS-05B18","price":799.95,"currency_code":"USD","in_stock":false},{"title":"B Series AWD","offer_id":45118447878178,"sku":"MFT-TRS-05RD1","price":999.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/mfactory-helical-limited-slip_1r32.jpg?v=1774988689"},{"product_id":"mfactory-helical-limited-slip-differential-honda-d-series","title":"MFactory Helical Limited Slip Differential for D15\/D16","description":"\u003cul\u003e\n\u003cli\u003e4 Fitments Variants Available \u003c\/li\u003e\n\u003cli\u003eHelical Style LSD \u003c\/li\u003e\n\u003cli\u003eUp to 75% Torque Transfer to One Wheel \u003c\/li\u003e\n\u003cli\u003eFitments for D15, D16, and DOHC ZC Transmissions \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eMFactory Helical Limited Slip Differential - Honda D Series\u003c\/h3\u003e\n\n\u003cp\u003eSpinning one wheel coming out of corners in your D series Civic or CRX and getting smoked by cars with LSDs? The MFactory helical LSD splits power between both wheels instead of sending all the torque to whichever wheel has less grip. I've run MFactory helical diffs in my D series track cars for years because they work and they don't need constant rebuilds like clutch-type LSDs. Your stock open diff sends 100% of power to the wheel with the least traction. That's why you're one-wheel-pegging it and going nowhere. The MFactory helical LSD can transfer up to 75% of torque to the wheel with more grip. You're getting way better corner exit traction and you're actually putting power down instead of spinning one tire.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why Open Diffs Are Garbage for Track Use\u003c\/h4\u003e\n\n\u003cp\u003eYour stock D series diff is an open differential. When you're cornering hard and one wheel lifts or loses traction, all the power goes to that wheel. The wheel with traction gets nothing. You're spinning the inside wheel and the car's not accelerating. An open diff works fine for street driving where you're not pushing the car, but on track it's useless. Every time you're trying to put power down coming out of a corner, you're spinning one wheel. The MFactory helical LSD uses gear geometry to split power between both wheels based on which wheel has more traction. When one wheel starts to slip, the diff transfers torque to the other wheel automatically. No clutch packs, no preload springs, just gears doing their thing. You get predictable power delivery and way better corner exit speed.\u003c\/p\u003e\n\n\u003ch4\u003eHelical LSD vs. Clutch-Type LSD\u003c\/h4\u003e\n\n\u003cp\u003eMost aftermarket LSDs are clutch-type (like Cusco or OBX). They use clutch packs that wear out and need rebuilds every few years. You're also supposed to run special diff fluid with friction modifiers. The MFactory helical LSD uses gears instead of clutches. There's nothing to wear out and you don't need special fluids. Just run regular gear oil and forget about it. I've got 5+ years and probably 100+ track days on my MFactory diff and it still works like new. Clutch-type diffs also change your steering feel because they bind up under certain conditions. The helical diff doesn't bind, so your steering feels normal.\u003c\/p\u003e\n\n\u003ch4\u003eForged Japanese Steel, Not Cast Garbage\u003c\/h4\u003e\n\n\u003cp\u003eThe MFactory diff's made from forged Japanese SAE 4320 and SAE 9310 steel. That's way stronger than cast steel or cheap Chinese forgings. The gears are double-tempered and cryogenically treated (super sub-zero treatment) for extra toughness. MFactory also shot-peens the gears to increase surface hardness. The diff's designed to handle drag racing shock loads, so it'll survive anything you throw at it on a road course or autocross. The gear geometry's designed to minimize parasitic drivetrain losses. MFactory claims their diffs transfer 1-2% more power to the wheels than competitors' diffs. That's not a huge number, but every bit helps.\u003c\/p\u003e\n\n\u003ch4\u003eFour Variants Based on Differential Bearing Size\u003c\/h4\u003e\n\n\u003cp\u003eMFactory makes four different D series LSDs based on differential bearing size and engine type. You MUST order the correct variant for your transmission or it won't fit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant 1: D15\/D16 35mm Differential Bearing (White Speedo Gear)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits: L3, S20, S40, S4C transmissions with white speedometer gear and A00\/A000 case stamp\u003c\/li\u003e\n  \u003cli\u003eEngines: D15B, D15B7, D15B8, D16A6, D16Z6, D16Y5, D16Y7 (with 35mm bearing transmissions)\u003c\/li\u003e\n  \u003cli\u003eVehicles: 1988-2000 Civic DX\/LX\/EX\/Si\/HX, CRX DX\/Si, Del Sol S\/Si (with white speedo gear)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant 2: D15\/D16 40mm Differential Bearing (Black Speedo Gear)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits: L3, S20, S40, S4C transmissions with black speedometer gear and B00\/B000 case stamp\u003c\/li\u003e\n  \u003cli\u003eEngines: D15B, D15B7, D16Z6, D16Y8, D16Y7 (with 40mm bearing transmissions)\u003c\/li\u003e\n  \u003cli\u003eVehicles: 1989-2000 Civic DX\/LX\/EX, 1996-2000 Civic EX (D16Y8 - most common), 1999-2000 Civic Si, Del Sol VTEC (with black speedo gear)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant 3: DOHC ZC Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits: S1, A1 transmissions (DOHC ZC only)\u003c\/li\u003e\n  \u003cli\u003eEngines: ZC DOHC (1.6L dual overhead cam, JDM engine)\u003c\/li\u003e\n  \u003cli\u003eVehicles: 1988-1991 Civic\/CRX with JDM DOHC ZC engine swap (ZC never sold in USA)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant 4: D17A Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits: SLXA, SLXM transmissions (D17 cable transmissions)\u003c\/li\u003e\n  \u003cli\u003eEngines: D17A1, D17A2, D17A6\u003c\/li\u003e\n  \u003cli\u003eVehicles: 2001-2005 Civic DX\/LX\/EX (7th gen, NOT EP3 Si which uses K20A3)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eHow to Identify Your Differential Bearing Size\u003c\/h4\u003e\n\n\u003cp\u003eIf you've got a D15 or D16 engine, you need to figure out if you've got 35mm or 40mm differential bearings. Here's how:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMethod 1 - Check Speedometer Gear Color:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemove your vehicle speed sensor (VSS) from the transmission\u003c\/li\u003e\n  \u003cli\u003eLook at the speedometer gear inside the transmission case\u003c\/li\u003e\n  \u003cli\u003eBlack gear = 40mm bearing (order Variant 2)\u003c\/li\u003e\n  \u003cli\u003eWhite gear = 35mm bearing (order Variant 1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMethod 2 - Check Transmission Case Stamp:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLook for a stamp on your transmission case near the transmission code\u003c\/li\u003e\n  \u003cli\u003eB00 or B000 stamp = 40mm bearing (order Variant 2)\u003c\/li\u003e\n  \u003cli\u003eA00 or A000 stamp = 35mm bearing (order Variant 1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMFactory helical limited slip differential (choose correct variant)\u003c\/li\u003e\n  \u003cli\u003eForged Japanese SAE 4320\/9310 steel construction\u003c\/li\u003e\n  \u003cli\u003eDouble-tempered and super sub-zero treated\u003c\/li\u003e\n  \u003cli\u003eShot-peened gears for increased surface hardness\u003c\/li\u003e\n  \u003cli\u003eUp to 75% torque transfer to one wheel\u003c\/li\u003e\n  \u003cli\u003eNo clutch packs (maintenance-free)\u003c\/li\u003e\n  \u003cli\u003eWorks with standard gear oil (no special fluids)\u003c\/li\u003e\n  \u003cli\u003eNo steering bind or adverse effects\u003c\/li\u003e\n  \u003cli\u003eBrighton-Best hardware included\u003c\/li\u003e\n  \u003cli\u003eLifetime globally transferable warranty\u003c\/li\u003e\n  \u003cli\u003ePower rating: supports up to 1000+ whp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Ordering the wrong variant will result in the differential NOT fitting. The 35mm and 40mm bearings are NOT interchangeable. Verify your bearing size before ordering by checking your speedometer gear color or transmission case stamp. If you're not sure which variant you need, remove your VSS and look at the speedo gear color, that's the easiest way to tell. Installation requires pulling your transmission and opening the diff. If you've never done diff work, get a shop to install it. The diff supports up to 1000+ whp, so it'll handle any D series build you throw at it.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-style: italic;\"\u003e*Images show the D17A variant. Other LSD variants may differ from what is depicted in the images. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cdiv\u003e1988-2000 Honda Civic CX\/DX\/EX\/LX\/VX\u003c\/div\u003e\n\u003cdiv\u003e2001-2005 Honda Civic DX\/EX\/LX\u003cbr\u003e\u003cdiv\u003e1988-1991 Honda CRX\u003c\/div\u003e\n\u003cdiv\u003e1993-1997 Honda Del Sol S\/Si\u003c\/div\u003e\n\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Limited Slip Differential\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"MFactory","offers":[{"title":"D Series (35mm Bearing)","offer_id":45118641700898,"sku":"MFT-TRS-05D15A","price":799.95,"currency_code":"USD","in_stock":false},{"title":"D Series (40mm Bearing)","offer_id":45118641733666,"sku":"MFT-TRS-05D15","price":799.95,"currency_code":"USD","in_stock":false},{"title":"DOHC ZC","offer_id":45118641766434,"sku":"MFT-TRS-05D15Z","price":799.95,"currency_code":"USD","in_stock":false},{"title":"D17A","offer_id":45118641799202,"sku":"MFT-TRS-05D17","price":799.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/mfactory-helical-limited-slip_o5ue.jpg?v=1774991879"},{"product_id":"mfactory-helical-limited-slip-differential-honda-h-series","title":"MFactory Helical Limited Slip Differential for F\/H Series","description":"\u003cul\u003e\n\u003cli\u003eCompatible with F22, F23, H22, and H23 Transmissions \u003c\/li\u003e\n\u003cli\u003eHelical Style LSD \u003c\/li\u003e\n\u003cli\u003eForged Steel Construction \u003c\/li\u003e\n\u003cli\u003eEliminates the One Wheel Peel! \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eMFactory Helical Limited Slip Differential - Honda F\/H Series (Accord\/Prelude)\u003c\/h3\u003e\n\n\u003cp\u003eRunning a Prelude or Accord at the track and spinning one wheel coming out of corners? Your stock open diff's sending all the power to whichever wheel has less grip. The MFactory helical LSD splits power between both wheels so you're actually putting power down instead of lighting up one tire. They work and they don't need constant rebuilds like clutch-type LSDs. Your stock open diff sends 100% of power to the wheel with the least traction. That's why you're one-wheel-pegging it and going nowhere. The MFactory helical LSD can transfer up to 75% of torque to the wheel with more grip. You're getting way better corner exit traction and you're not wasting power spinning one wheel.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why Open Diffs Suck for Track Use\u003c\/h4\u003e\n\n\u003cp\u003eYour stock F or H series diff is an open differential. When you're cornering hard and one wheel lifts or loses traction, all the power goes to that wheel. The wheel with traction gets nothing. You're spinning the inside wheel and the car's not accelerating. An open diff works fine for street driving where you're not pushing the car, but on track it's useless. Every time you're trying to put power down coming out of a corner, you're spinning one wheel and your lap times suffer. The MFactory helical LSD uses gear geometry to split power between both wheels based on which wheel has more traction. When one wheel starts to slip, the diff transfers torque to the other wheel automatically. No clutch packs, no preload springs, just gears doing their thing. You get predictable power delivery and way better corner exit speed.\u003c\/p\u003e\n\n\u003ch4\u003eHelical LSD vs. Clutch-Type LSD\u003c\/h4\u003e\n\n\u003cp\u003eMost aftermarket LSDs are clutch-type (like Cusco or OBX). They use clutch packs that wear out and need rebuilds every few years. You're also supposed to run special diff fluid with friction modifiers. The MFactory helical LSD uses gears instead of clutches. There's nothing to wear out and you don't need special fluids. Just run regular gear oil and forget about it. I've got 5+ years and probably 100+ track days on my MFactory diff and it still works like new. Clutch-type diffs also change your steering feel because they bind up under certain conditions. The helical diff doesn't bind, so your steering feels normal.\u003c\/p\u003e\n\n\u003ch4\u003eForged Japanese Steel, Not Cast\u003c\/h4\u003e\n\n\u003cp\u003eThe MFactory diff's made from forged Japanese SAE 4320 and SAE 9310 steel. That's way stronger than cast steel or cheap Chinese forgings. The gears are double-tempered and cryogenically treated (super sub-zero treatment) for extra toughness. MFactory also shot-peens the gears to increase surface hardness. The diff's designed to handle drag racing shock loads, so it'll survive anything you throw at it on a road course or autocross. The gear geometry's designed to minimize parasitic drivetrain losses. MFactory claims their diffs transfer 1-2% more power to the wheels than competitors' diffs. That's not a huge number, but every bit helps when you're chasing lap times.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMFactory helical limited slip differential\u003c\/li\u003e\n  \u003cli\u003eForged Japanese SAE 4320\/9310 steel construction\u003c\/li\u003e\n  \u003cli\u003eDouble-tempered and super sub-zero treated\u003c\/li\u003e\n  \u003cli\u003eShot-peened gears for increased surface hardness\u003c\/li\u003e\n  \u003cli\u003eUp to 75% torque transfer to one wheel\u003c\/li\u003e\n  \u003cli\u003eNo clutch packs (maintenance-free)\u003c\/li\u003e\n  \u003cli\u003eWorks with standard gear oil (no special fluids)\u003c\/li\u003e\n  \u003cli\u003eNo steering bind or adverse effects\u003c\/li\u003e\n  \u003cli\u003eBrighton-Best hardware included\u003c\/li\u003e\n  \u003cli\u003eLifetime globally transferable warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits Your Car\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003e1990-2002 Honda Accord:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1990-1993 Honda Accord (F22A engine, M2F4\/M2S4 transmission)\u003c\/li\u003e\n  \u003cli\u003e1994-1997 Honda Accord (F22B engine, M2Y4\/P2A4 transmission)\u003c\/li\u003e\n  \u003cli\u003e1998-2002 Honda Accord (F23A engine, P2A5\/P2A8 transmission)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e1992-2001 Honda Prelude:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1992-1996 Honda Prelude Si (H23A engine, M2U4\/M2U5 transmission)\u003c\/li\u003e\n  \u003cli\u003e1992-1996 Honda Prelude VTEC (H22A1 engine, H2U4\/H2U5 transmission)\u003c\/li\u003e\n  \u003cli\u003e1997-2001 Honda Prelude VTEC (H22A4 engine, H2A5\/P2U5 transmission)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCompatible Engines\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eF22A (1990-1993 Accord)\u003c\/li\u003e\n  \u003cli\u003eF22B (1994-1997 Accord)\u003c\/li\u003e\n  \u003cli\u003eF23A (1998-2002 Accord)\u003c\/li\u003e\n  \u003cli\u003eH22A1 (1992-1996 Prelude VTEC)\u003c\/li\u003e\n  \u003cli\u003eH22A4 (1997-2001 Prelude VTEC)\u003c\/li\u003e\n  \u003cli\u003eH23A (1992-1996 Prelude Si)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCompatible Transmissions\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eH2A5 (5-speed manual, 1997-2001 Prelude VTEC)\u003c\/li\u003e\n  \u003cli\u003eH2U4 (5-speed manual, 1992-1996 Prelude VTEC)\u003c\/li\u003e\n  \u003cli\u003eH2U5 (5-speed manual, 1992-1996 Prelude VTEC)\u003c\/li\u003e\n  \u003cli\u003eM2F4 (5-speed manual, 1990-1993 Accord)\u003c\/li\u003e\n  \u003cli\u003eM2S4 (5-speed manual, 1990-1993 Accord)\u003c\/li\u003e\n  \u003cli\u003eM2U4 (5-speed manual, 1992-1996 Prelude Si)\u003c\/li\u003e\n  \u003cli\u003eM2U5 (5-speed manual, 1992-1996 Prelude Si)\u003c\/li\u003e\n  \u003cli\u003eM2Y4 (5-speed manual, 1994-1997 Accord)\u003c\/li\u003e\n  \u003cli\u003eP2A4 (5-speed manual, 1994-1997 Accord)\u003c\/li\u003e\n  \u003cli\u003eP2A5 (5-speed manual, 1998-2002 Accord)\u003c\/li\u003e\n  \u003cli\u003eP2A8 (5-speed manual, 1998-2002 Accord)\u003c\/li\u003e\n  \u003cli\u003eP2U5 (5-speed manual, 1997-2001 Prelude VTEC)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This LSD does NOT fit 1997-2001 Prelude SH models with the factory ATTS (Active Torque Transfer System) LSD. The Prelude SH came with a factory mechanical LSD and uses a different differential case. This MFactory LSD only fits Prelude models that came with an open differential from the factory. Installation requires pulling your transmission and opening the diff. If you've never done diff work, get a shop to install it.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 1990-2002 Honda Accord\u003cdiv\u003e1992-2001 Honda Prelude*\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-style: italic;\"\u003e*Will Not Fit Type SH with OEM LSD\u003c\/span\u003e\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Limited Slip Differential\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"MFactory","offers":[{"title":"Default Title","offer_id":45118737711138,"sku":"MFT-TRS-05H22","price":799.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/MFT-TRS-05H22_tofm.jpg?v=1774993298"},{"product_id":"mfactory-helical-limited-slip-differential-honda-k-series","title":"MFactory Helical Limited Slip Differential for K Series","description":"\u003cul\u003e\n\u003cli\u003eFWD and AWD Fitments Available \u003c\/li\u003e\n\u003cli\u003eCompatible with K20A, K20Z, and K24A Transmissions \u003c\/li\u003e\n\u003cli\u003eHelical Style LSD \u003c\/li\u003e\n\u003cli\u003eUp to 75% Torque Transfer to One Wheel \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eMFactory Helical Limited Slip Differential - Honda\/Acura K Series\u003c\/h3\u003e\n\n\u003cp\u003eSpinning one wheel coming out of corners in your K series and getting left behind by cars with LSDs? The MFactory helical LSD splits power between both wheels instead of sending all the torque to whichever wheel has less grip. MFactory helical diffs work and they don't need constant rebuilds like clutch-type LSDs. Your stock open diff sends 100% of power to the wheel with the least traction. That's why you're one-wheel-pegging it in your RSX or Civic Si and going nowhere. The MFactory helical LSD can transfer up to 75% of torque to the wheel with more grip. You're getting way better corner exit traction and you're actually putting power down instead of spinning one tire.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why Open Diffs Are Useless for Track Use\u003c\/h4\u003e\n\n\u003cp\u003eYour stock K series diff is an open differential. When you're cornering hard and one wheel lifts or loses traction, all the power goes to that wheel. The wheel with traction gets nothing. You're spinning the inside wheel and the car's not accelerating. An open diff works fine for street driving where you're not pushing the car, but on track it's garbage. Every time you're trying to put power down coming out of a corner, you're spinning one wheel and your lap times suffer. The MFactory helical LSD uses gear geometry to split power between both wheels based on which wheel has more traction. When one wheel starts to slip, the diff transfers torque to the other wheel automatically. No clutch packs, no preload springs, just gears doing their thing. You get predictable power delivery and way better corner exit speed.\u003c\/p\u003e\n\n\u003ch4\u003eHelical LSD vs. Clutch-Type LSD\u003c\/h4\u003e\n\n\u003cp\u003eMost aftermarket LSDs are clutch-type (like Cusco or OBX). They use clutch packs that wear out and need rebuilds every few years. You're also supposed to run special diff fluid with friction modifiers. The MFactory helical LSD uses gears instead of clutches. There's nothing to wear out and you don't need special fluids. Just run regular gear oil and forget about it. MFactory diffs hold up to 5+ years and 100+ track days without needing rebuilds. Clutch-type diffs also change your steering feel because they bind up under certain conditions. The helical diff doesn't bind, so your steering feels normal.\u003c\/p\u003e\n\n\u003ch4\u003eForged Chromoly Steel, Not Cast\u003c\/h4\u003e\n\n\u003cp\u003eThe MFactory diff's made from forged Japanese SAE 4320 and SAE 9310 chromoly steel. That's way stronger than cast steel or cheap Chinese forgings. The gears are double-tempered and cryogenically treated (super sub-zero treatment) for extra toughness. MFactory also shot-peens the gears to increase surface hardness. The diff's designed to handle drag racing shock loads, so it'll survive anything you throw at it on a road course or autocross. The gear geometry's designed to minimize parasitic drivetrain losses. MFactory claims their diffs transfer 1-2% more power to the wheels than competitors' diffs. That's not a huge number, but every bit helps when you're chasing lap times.\u003c\/p\u003e\n\n\u003ch4\u003eTwo Variants - FWD or AWD\u003c\/h4\u003e\n\n\u003cp\u003eMFactory makes two different K series LSDs: one for FWD transmissions and one for AWD transmissions. Make sure you order the correct variant for your car.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFWD Variant:\u003c\/strong\u003e Fits all K series FWD manual transmissions (RSX, TSX, Civic Si, Accord, CR-V FWD, Element)\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAWD Variant:\u003c\/strong\u003e Fits K series AWD manual transmissions (CR-V AWD)\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMFactory helical limited slip differential (choose FWD or AWD variant)\u003c\/li\u003e\n  \u003cli\u003eForged Japanese SAE 4320\/9310 chromoly steel construction\u003c\/li\u003e\n  \u003cli\u003eDouble-tempered and super sub-zero treated\u003c\/li\u003e\n  \u003cli\u003eShot-peened gears for increased surface hardness\u003c\/li\u003e\n  \u003cli\u003eUp to 75% torque transfer to one wheel\u003c\/li\u003e\n  \u003cli\u003eNo clutch packs (maintenance-free)\u003c\/li\u003e\n  \u003cli\u003eWorks with standard gear oil (no special fluids)\u003c\/li\u003e\n  \u003cli\u003eNo steering bind or adverse effects\u003c\/li\u003e\n  \u003cli\u003eBrighton-Best hardware included\u003c\/li\u003e\n  \u003cli\u003eLifetime globally transferable warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFWD Variant - Fits Your Car\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2002-2006 Acura RSX Base\/Type S (K20A3, K20A2, K20Z1)\u003c\/li\u003e\n  \u003cli\u003e2004-2008 Acura TSX (K24A2)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Honda Accord (K24A4, K24A8 - 4-cylinder manual only)\u003c\/li\u003e\n  \u003cli\u003e2002-2005 Honda Civic Si EP3 (K20A3)\u003c\/li\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si FA5\/FG2 (K20Z3)\u003c\/li\u003e\n  \u003cli\u003e2002-2006 Honda CR-V (K24A1 - FWD manual transmission only)\u003c\/li\u003e\n  \u003cli\u003e2003-2011 Honda Element (K24A4, K24A8 - manual transmission only)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAWD Variant - Fits Your Car\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2002-2006 Honda CR-V (K24A1 - AWD manual transmission, rear differential)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2002-2006 Acura RSX\u003cdiv\u003e2004-2008 Acura TSX\u003c\/div\u003e\n\u003cdiv\u003e2003-2007 Honda Accord (K24)\u003c\/div\u003e\n\u003cdiv\u003e2002-2005 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2002-2006 Honda CR-V*\u003c\/div\u003e\n\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-style: italic;\"\u003e*FWD and AWD Variants Use Different Part #s\u003c\/span\u003e\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Limited Slip Differential\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"MFactory","offers":[{"title":"FWD","offer_id":45118831755298,"sku":"MFT-TRS-05K20","price":799.95,"currency_code":"USD","in_stock":false},{"title":"AWD","offer_id":45118831788066,"sku":"MFT-TRS-05K20-AWD","price":899.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/mfactory-helical-limited-slip_6xtz.jpg?v=1774995166"}],"url":"https:\/\/www.hybrid-racing.com\/collections\/mfactory.oembed","provider":"Hybrid Racing","version":"1.0","type":"link"}