{"product_id":"wiseco-acura-k20-k24-flat-top-1-181x87mm-piston-shelf-stock-kit","title":"Wiseco K631M87 87mm Flat Top Piston Kit 11.0:1 for Honda\/Acura K24 w\/K20 Head","description":"\u003cmeta name=\"description\" content=\"Upgrade your Honda\/Acura K24 with Wiseco's 87mm piston kit for enhanced performance. Ideal for turbocharged builds.\"\u003e\u003cmeta name=\"keywords\" content=\"K24 piston kit, Wiseco 87mm piston, Honda Acura performance parts, high-compression pistons, forged aluminum pistons, K20 engine components, racing piston set, turbocharged piston kit, automotive engine parts, K-series engine upgrades\"\u003e\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUniversal -- Honda\/Acura K24 engine block with K20 cylinder head\u003c\/li\u003e\n\u003cli\u003eCommon donor blocks: K24A1 (CR-V\/Element), K24A2 (TSX), K24A4\/K24A8 (Accord), K24Z1\/K24Z3\/K24Z7\u003c\/li\u003e\n\u003cli\u003eCommon donor heads: K20A, K20A2, K20A3, K20Z1, K20Z3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDesigned specifically for K24 block + K20 cylinder head combination -- not a stock K20 or K24 replacement\u003c\/li\u003e\n\u003cli\u003eVerify compression height and bore size against your specific build before ordering\u003c\/li\u003e\n\u003cli\u003e87mm bore -- requires cylinder boring from standard K24 bore (87.0mm overbore)\u003c\/li\u003e\n\u003cli\u003eNot CARB legal -- race and off-road use only\u003c\/li\u003e\n\u003cli\u003eProfessional engine builder installation required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWiseco Sport Compact series\u003c\/li\u003e\n\u003cli\u003e2618 aluminum forged construction -- superior tensile strength over 4032\u003c\/li\u003e\n\u003cli\u003eArmorGlide skirt coating -- seizure resistant, friction reducing, quieter operation\u003c\/li\u003e\n\u003cli\u003eLarger and deeper valve pockets -- fits aggressive camshafts\u003c\/li\u003e\n\u003cli\u003eGas nitrided top ring -- excellent for turbocharged applications\u003c\/li\u003e\n\u003cli\u003eNapier 2nd ring -- superior oil control\u003c\/li\u003e\n\u003cli\u003eAnti-detonation groove\u003c\/li\u003e\n\u003cli\u003ePrecision CNC-machined crown\u003c\/li\u003e\n\u003cli\u003eEngineered, forged, and machined in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBore: 87.00mm (3.425\")\u003c\/li\u003e\n\u003cli\u003eCompression height: 1.181\" (30mm)\u003c\/li\u003e\n\u003cli\u003eStroke: 3.897\" (99mm -- K24)\u003c\/li\u003e\n\u003cli\u003eRod length: 5.984\" (152mm)\u003c\/li\u003e\n\u003cli\u003ePin diameter: 22mm (0.866\")\u003c\/li\u003e\n\u003cli\u003eCrown: Flat top, -3.4cc dish\u003c\/li\u003e\n\u003cli\u003eCompression ratio: 11.0:1\u003c\/li\u003e\n\u003cli\u003eAlloy: 2618 aluminum\u003c\/li\u003e\n\u003cli\u003eQuantity: Set of 4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4x Forged 2618 aluminum pistons\u003c\/li\u003e\n\u003cli\u003e4x 22mm 4130 chromoly wrist pins\u003c\/li\u003e\n\u003cli\u003e4x Spirolox wrist pin retainers\u003c\/li\u003e\n\u003cli\u003e4x Piston ring sets (gas nitrided top + Napier 2nd + oil ring)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003eThe Wiseco K631M87 is an 87mm flat top piston kit engineered for the popular Honda\/Acura K24 block + K20 cylinder head engine combination -- one of the most common high-performance K-series builds used in both naturally aspirated and forced induction applications. The K24 block's longer 99mm stroke paired with the high-revving K20 cylinder head delivers significant displacement and power advantages over a stock K20 or K24 alone, and this piston set is designed specifically to accommodate the K20 head's valve placement and port geometry with larger, deeper valve pockets that clear aggressive aftermarket camshafts.\u003c\/p\u003e\u003cp\u003eForged in-house by Wiseco from 2618 aluminum -- the preferred alloy for high-stress and forced induction applications due to its superior tensile strength and thermal expansion properties -- each piston is CNC-machined to final dimension and coated with Wiseco's proprietary ArmorGlide skirt coating for reduced friction and seizure resistance. The included ring package features a gas nitrided top ring well-suited for turbocharged builds and a Napier 2nd ring for excellent oil control. Requires cylinder boring to 87.00mm. Professional engine builder installation required. Not CARB legal. Engineered, forged, and machined in the USA.\u003c\/p\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":53325024526655,"sku":"WISK631M87","price":566.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/4e846314-6f9e-4dc2-b4cb-5ea42440e524-800_4f8931b6-c038-451b-9f57-852cf032aad1.jpg?v=1780025348","url":"https:\/\/wcaperformance.com\/products\/wiseco-acura-k20-k24-flat-top-1-181x87mm-piston-shelf-stock-kit","provider":"WCA Performance","version":"1.0","type":"link"}