{"product_id":"wiseco-honda-acura-b-series-flat-top-10-5-1-piston-shelf-stock-kit-1","title":"Wiseco K623M845 Forged Piston Kit for 1989-2001 Honda B16 \/ B18","description":"\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eHonda B16A engines (e.g., Civic Si 1993-2001)\u003c\/li\u003e \u003cli\u003eHonda \/ Acura B18 engines (e.g., Integra, LS\/GS\/Type-R, 1989-2001)\u003c\/li\u003e \u003cli\u003eHonda B20B \/ B20Z with VTEC head applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eForged 2618 aluminum for high strength and performance\u003c\/li\u003e \u003cli\u003eArmorGlide® low-friction skirt coating to reduce wear\u003c\/li\u003e \u003cli\u003eFlat-top crown design for optimized compression and pistons stability\u003c\/li\u003e \u003cli\u003eStrutted forging design to enhance rigidity under high load\u003c\/li\u003e \u003cli\u003ePrecision-machined ring grooves for excellent sealing\u003c\/li\u003e \u003cli\u003e21 mm wrist pin for durability and stability\u003c\/li\u003e \u003cli\u003ePerformance-ready for naturally aspirated and tuned builds\u003c\/li\u003e \u003cli\u003eComes with premium ring set (8450XX)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eBore: 84.50 mm\u003c\/li\u003e \u003cli\u003eCompression Height: 30.00 mm\u003c\/li\u003e \u003cli\u003eWrist Pin Diameter: 21 mm\u003c\/li\u003e \u003cli\u003ePiston Material: 2618 Forged Aluminum\u003c\/li\u003e \u003cli\u003ePiston Weight: ~302 g\u003c\/li\u003e \u003cli\u003eCompression Ratio: Various - 9.44:1 (B16A), ~10.0:1 (B18A1\/B1), up to 10.7:1 (B18C GSR)\u003c\/li\u003e \u003cli\u003eSet Quantity: 4 Pistons\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e4x forged pistons\u003c\/li\u003e \u003cli\u003e4x 21 mm wrist pins\u003c\/li\u003e \u003cli\u003e1x piston ring set (8450XX)\u003c\/li\u003e \u003cli\u003eCirclips \/ wrist-pin retainers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003eThe Wiseco K623M845 is a high-performance forged piston kit tailored for Honda B-series engines, including B16A, B18A\/B1, and B20B\/Z (with VTEC heads). Built from strong 2618 aluminum, these pistons are designed for serious builds - whether you're doing a high-RPM naturally aspirated motor or a tuned race setup.\u003c\/p\u003e\u003cp\u003eThis kit features a flat-top crown and comes in several compression variants: for example, 9.44:1 for B16A, ~10.0:1 for B18A1\/B1, and up to 10.7:1 for B18C GSR applications. The strutted forging design boosts strength, while ArmorGlide® coating reduces friction and improves longevity. Precision machining ensures great sealing, and the included 8450XX ring set provides reliable performance under load.\u003c\/p\u003e\u003cp\u003eWhether you're building a street engine, race motor, or VTEC-powered B-series, the K623M845 offers a strong foundation. Proper assembly - including checking ring gaps, measuring clearances, and following torque specs - ensures you'll get maximum performance and durability from your build.\u003c\/p\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":53325024395583,"sku":"WISK623M845","price":566.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/4e846314-6f9e-4dc2-b4cb-5ea42440e524-800_aeb8a358-c072-4644-a961-007a498a1eb1.jpg?v=1780025347","url":"https:\/\/wcaperformance.com\/products\/wiseco-honda-acura-b-series-flat-top-10-5-1-piston-shelf-stock-kit-1","provider":"WCA Performance","version":"1.0","type":"link"}