{"product_id":"honda-k20z1-k20z3-k24a2-final-drive-gear-41233-pzf-020","title":"Honda K20Z1\/K24A2 Final Drive Gear 41233-PZF-020","description":"\u003cul\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eFits NSN4, ASU5, and PNN4 Transmissions \u003c\/li\u003e\n\u003cli\u003eWorks with K20Z1, 06 K20Z3, and K24A2 \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 \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eGenuine Honda K20Z1\/K24A2 Final Drive Gear (41233-PZF-020)\u003c\/h3\u003e\n\n\u003cp\u003eThis is the genuine Honda final drive gear for the K20Z1 and K24A2 transmissions, the ring gear that sets your final drive ratio and transfers power from the transmission to the differential. It's the part you need when you're rebuilding a transmission, replacing a worn or damaged final drive, or installing a limited-slip differential, since an LSD bolts to this ring gear. It fits the ASU5, NSN4, and PNN4 transmissions. Confirm your transmission before ordering, because related K-series transmissions use a different final drive.\u003c\/p\u003e\n\n\u003ch4\u003eConfirm Your Transmission First\u003c\/h4\u003e\n\n\u003cp\u003eThe most important thing on this page, because the wrong final drive won't work in your transmission.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis gear (41233-PZF-020)\u003c\/strong\u003e fits the \u003cstrong\u003eNSN4\u003c\/strong\u003e transmission (K20Z1), the \u003cstrong\u003eASU5\u003c\/strong\u003e transmission (K24A2), and the \u003cstrong\u003ePNN4\u003c\/strong\u003e transmission (2006 Civic Si Coupe). If you're building or rebuilding one of those, this is your final drive.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe 2007-2011 Civic Si is different.\u003c\/strong\u003e It came with the \u003cstrong\u003ePNN3 transmission\u003c\/strong\u003e, which uses a different final drive gear, the \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-k20z3-final-drive-gear-41233-rpt-010\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e41233-RPT-010\u003c\/a\u003e. So if you've got a 07-11 Si or a PNN3 transmission, you need the RPT gear, not this one.\u003c\/p\u003e\n\n\u003cp\u003eThe rule: match the final drive to your actual transmission, not just the chassis, especially on the Civic Si, where the 2006 coupe (PNN4, this gear) and the 2007-2011 (PNN3, the RPT gear) take different final drives. Verify your transmission code before ordering.\u003c\/p\u003e\n\n\u003ch4\u003eWhat the Final Drive Does\u003c\/h4\u003e\n\n\u003cp\u003eThe final drive gear (the ring gear) is the last gear reduction in the transmission, it's what the differential turns, and its ratio sets how engine RPM translates to wheel speed in every gear. It takes all the torque coming through the transmission and sends it to the differential and out to the axles.\u003c\/p\u003e\n\n\u003cp\u003eYou need a new one in a few situations: rebuilding a transmission where the original is worn, replacing a final drive damaged by a failure, or swapping to this ratio. It's also the gear a limited-slip differential mounts to, so an LSD install involves this ring gear directly.\u003c\/p\u003e\n\n\u003ch4\u003eWorks With K-Series LSDs\u003c\/h4\u003e\n\n\u003cp\u003eImportant if you're building the transmission with a limited-slip differential.\u003c\/p\u003e\n\n\u003cp\u003eThis final drive gear works with K-series limited-slip differentials, the LSD bolts to this ring gear. So if you're installing an LSD into your K20Z1 or K24A2 transmission, this is the compatible final drive, and the two go together as part of building a proper limited-slip setup. An LSD transforms how the car puts power down out of corners, and it mounts to this gear.\u003c\/p\u003e\n\n\u003ch4\u003eYou'll Need Fresh Ring Gear Bolts\u003c\/h4\u003e\n\n\u003cp\u003eDon't reuse the old ones.\u003c\/p\u003e\n\n\u003cp\u003eWhenever the ring gear comes off, for this final drive swap, an LSD install, or a rebuild, you need fresh \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-k-j-series-ring-gear-bolts-90017-pyz-000\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ering gear bolts\u003c\/a\u003e. They're torque-to-yield fasteners that stretch when torqued, so they can't be reused reliably. And note: if you're installing an LSD, you need the \u003cstrong\u003eshouldered\u003c\/strong\u003e ring gear bolts (the higher-torque version), not the standard non-shouldered ones, even if your transmission didn't originally have an LSD. Ten bolts are required, so order a fresh set with this gear.\u003c\/p\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\n\u003cp\u003e2005-2006 Acura RSX Type-S (K20Z1, NSN4 transmission)\u003cbr\u003e2004-2008 Acura TSX (K24A2, ASU5 transmission)\u003cbr\u003e2006 Honda Civic Si Coupe (PNN4 transmission)\u003c\/p\u003e\n\n\u003cp\u003ePart number 41233-PZF-020. Not for the 2007-2011 Civic Si (PNN3), which uses the \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-k20z3-final-drive-gear-41233-rpt-010\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e41233-RPT-010\u003c\/a\u003e final drive. Confirm your transmission before ordering.\u003c\/p\u003e\n\n\u003cp\u003eIf you're building or rebuilding a K20Z1 or K24A2 transmission, replacing a worn final drive, or installing an LSD in an RSX Type-S, TSX, or 06 Si Coupe, this is the genuine Honda ring gear for the job. Confirm you've got the NSN4, ASU5, or PNN4 transmission, grab fresh shouldered ring gear bolts (and your LSD if you're adding one), and build the final drive right.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e2005-2006 Acura RSX Type S\u003cbr\u003e2004-2008 Acura TSX\u003cbr\u003e2006 Honda Civic Si Coupe\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Honda","offers":[{"title":"Default Title","offer_id":67958276325410,"sku":"OHA-41233-PZF-020","price":634.12,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/OHA-41233-PZF-020_eogc.jpg?v=1791400250","url":"https:\/\/www.hybrid-racing.com\/products\/honda-k20z1-k20z3-k24a2-final-drive-gear-41233-pzf-020","provider":"Hybrid Racing","version":"1.0","type":"link"}