{"product_id":"wiseco-81mm-forged-pistons-kit-90-01-integra-b18","title":"Wiseco B Series Forged Piston Kit for 90-01 Integra","description":"\u003cul\u003e\n\u003cli\u003eAvailable in Multiple Bore Sizes \u003c\/li\u003e\n\u003cli\u003eSpecific Fitments for Forced Induction and Naturally Aspirated Setups \u003c\/li\u003e\n\u003cli\u003eFitments for B16A, B18A, B18B, and B18C Engines \u003c\/li\u003e\n\u003cli\u003eWrist Pins, Piton Rings, and Pistons All Included \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\u003eWiseco B Series Forged Pistons - B16\/B18 Motors\u003c\/h3\u003e\n\n\u003cp\u003eYou're building a B series motor and you need pistons that aren't going to crack when you're making serious power. Wiseco forges these pistons from 2618 aluminum for B16 and B18 motors. They're designed for all-motor builds, turbo builds, and everything in between. The 2618 alloy's way stronger than the cast or hypereutectic pistons Honda uses from the factory. These pistons handle detonation, high cylinder pressures, and sustained high RPM without cracking. Wiseco makes these pistons in four different bore sizes: 81mm (stock B18), 81.25mm (+0.25mm over), 81.5mm (+0.5mm over), and 82mm (+1mm over). You can get them configured for naturally aspirated builds or turbo builds. The pistons run between 8.2:1 and 8.6:1 compression ratio depending on your exact application. If you're swapping a VTEC head onto a non-VTEC block, these pistons work for that too.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why 2618 Aluminum Matters\u003c\/h4\u003e\n\n\u003cp\u003eStock B series pistons are cast aluminum. Cast pistons work fine for stock power levels but they're brittle. When you start making serious power, whether that's from high compression and aggressive cams or from boost, cylinder pressures go up and cast pistons crack. The top ring land cracks, the skirt cracks, you're pulling the motor apart to replace broken pistons. Wiseco forges these pistons from 2618 aluminum. The forging process compresses the grain structure and makes the material way stronger. The 2618 alloy itself has higher tensile strength and better heat resistance than the cheaper 4032 alloy you see in budget forged pistons. That means these pistons handle detonation events without cracking. If you accidentally lean out and you get a little knock, the 2618 pistons absorb it. Cast pistons would crack.\u003c\/p\u003e\n\n\u003ch4\u003eArmorGlide Skirt Coating\u003c\/h4\u003e\n\n\u003cp\u003eWiseco coats the piston skirts with ArmorGlide. That's a friction-reducing coating that lets the piston move up and down the cylinder bore with less resistance. Less friction means less heat, quieter operation, and better seizure resistance if you ever lose oil pressure or your cooling system fails. The coating also helps the pistons survive initial startup when there's not full oil pressure yet. Stock pistons don't have a skirt coating so they're scuffing the cylinder walls every time you cold start the motor. ArmorGlide prevents that.\u003c\/p\u003e\n\n\u003ch4\u003eAnti-Detonation Grooves and Forced Pin Oiling\u003c\/h4\u003e\n\n\u003cp\u003eWiseco machines anti-detonation grooves into the top of the piston. Those grooves disrupt the flame front during combustion and reduce the chance of detonation. They're not going to save you if you're running a garbage tune but they help. The pistons also have forced pin oiling. There's an oiling hole that directs oil to the wrist pin during the compression stroke. That keeps the pin and the small end of the rod lubricated under high loads. Better lubrication means less wear and longer life.\u003c\/p\u003e\n\n\u003ch4\u003ePick Your Bore Size and Application\u003c\/h4\u003e\n\n\u003cp\u003eWiseco makes these pistons in four bore sizes. Stock B18 bore is 81mm. If your block's still at stock bore and the cylinder walls are in good shape, you can run the 81mm pistons. If you're rebuilding a high-mileage motor or you've got some scoring in the cylinders, you might need to overbore. The 81.25mm pistons are a +0.25mm overbore. The 81.5mm pistons are a +0.5mm overbore. The 82mm pistons are a +1mm overbore. Your machine shop will measure your cylinder walls and tell you what bore size you need. Don't guess. Have them measure it with a bore gauge.\u003c\/p\u003e\n\n\u003cp\u003eWhen you're ordering, you'll also need to specify whether you're building a naturally aspirated motor or a turbo motor. The piston configuration's different between the two. If you're building an all-motor B series with cams and a built head, order the naturally aspirated pistons. If you're building a turbo motor, order the turbo pistons. The compression ratio's going to be between 8.2:1 and 8.6:1 depending on your exact motor combination, head type, and deck height. That's a safe compression range for both all-motor and turbo builds. For all-motor, 8.5:1 to 8.6:1 gives you good power without needing race gas. For turbo, 8.2:1 to 8.4:1 lets you run boost on pump gas without knocking.\u003c\/p\u003e\n\n\u003ch4\u003eVTEC Head on Non-VTEC Block\u003c\/h4\u003e\n\n\u003cp\u003eThese pistons work for B18A and B18B non-VTEC motors and they also work for B18C1 and B18C5 VTEC motors. If you're doing a mini-me build where you're putting a VTEC head on a non-VTEC block, these pistons work for that too. The piston dome design's compatible with both VTEC and non-VTEC combustion chambers. You're not hunting for special pistons. The same Wiseco B series pistons work across the whole B18 family. They also work for B16A2 and B16A3 motors if you're building a B16.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWiseco forged piston set for B series motors (4 pistons)\u003c\/li\u003e\n  \u003cli\u003eForged from 2618 aluminum in the USA\u003c\/li\u003e\n  \u003cli\u003eArmorGlide skirt coating for reduced friction and seizure resistance\u003c\/li\u003e\n  \u003cli\u003eAnti-detonation grooves machined into piston crown\u003c\/li\u003e\n  \u003cli\u003eForced pin oiling for wrist pin lubrication\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined ring grooves\u003c\/li\u003e\n  \u003cli\u003eFully machined crown for structural integrity\u003c\/li\u003e\n  \u003cli\u003eAvailable in four bore sizes: 81mm, 81.25mm, 81.5mm, 82mm\u003c\/li\u003e\n  \u003cli\u003eAvailable for naturally aspirated or turbo applications\u003c\/li\u003e\n  \u003cli\u003eCompression ratio: 8.2:1 to 8.6:1 (depending on application)\u003c\/li\u003e\n  \u003cli\u003ePiston rings included\u003c\/li\u003e\n  \u003cli\u003eWrist pins and circlips included\u003c\/li\u003e\n  \u003cli\u003eCompression height: 30.00mm\u003c\/li\u003e\n  \u003cli\u003eWrist pin diameter: 0.827 inch (21mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits These Motors\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eB18A1\u003c\/li\u003e\n  \u003cli\u003eB18B1\u003c\/li\u003e\n  \u003cli\u003eB18C1\u003c\/li\u003e\n  \u003cli\u003eB18C5\u003c\/li\u003e\n  \u003cli\u003eB16A2\u003c\/li\u003e\n  \u003cli\u003eB16A3\u003c\/li\u003e\n  \u003cli\u003eVTEC head on non-VTEC block builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Have your machine shop measure cylinder walls with a bore gauge before ordering - don't guess on bore size. Order naturally aspirated pistons for all-motor builds or turbo pistons for boosted builds - the piston configuration's different between the two. Follow Wiseco's piston-to-wall clearance specs for 2618 aluminum during assembly. Too tight and the pistons will seize when hot, too loose and you'll have piston slap and blow-by.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 1990-2001 Acura Integra GS\/LS\/RS\/Special Edition\u003cdiv\u003e1992-2001 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\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(4) Pistons\u003cdiv\u003e(4) Piston Ring Sets\u003c\/div\u003e\n\u003cdiv\u003e(4) Wrist Pins\u003c\/div\u003e\n\u003cdiv\u003e(8) Wrist Pin Retainers\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Wiseco","offers":[{"title":"81mm \/ NA","offer_id":45304445075490,"sku":"WSC-K541M81","price":697.99,"currency_code":"USD","in_stock":false},{"title":"81mm \/ Turbo","offer_id":45304445108258,"sku":"WSC-K541M81AP","price":776.99,"currency_code":"USD","in_stock":false},{"title":"81.25mm \/ NA","offer_id":45304445141026,"sku":"WSC-K541M8125","price":697.99,"currency_code":"USD","in_stock":false},{"title":"81.25mm \/ Turbo","offer_id":45304445173794,"sku":"WSC-K541M8125AP","price":776.99,"currency_code":"USD","in_stock":false},{"title":"81.5mm \/ NA","offer_id":45304445206562,"sku":"WSC-K541M815","price":697.99,"currency_code":"USD","in_stock":false},{"title":"81.5mm \/ Turbo","offer_id":45304445239330,"sku":"WSC-K541M815AP","price":776.99,"currency_code":"USD","in_stock":false},{"title":"82mm \/ NA","offer_id":45304445272098,"sku":"WSC-K541M82","price":697.99,"currency_code":"USD","in_stock":false},{"title":"82mm \/ Turbo","offer_id":45304445304866,"sku":"WSC-K541M82AP","price":776.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/wiseco-b18-forged-piston-kit-f_8qv4.jpg?v=1777402609","url":"https:\/\/www.hybrid-racing.com\/products\/wiseco-81mm-forged-pistons-kit-90-01-integra-b18","provider":"Hybrid Racing","version":"1.0","type":"link"}