{"title":"CP Pistons Subaru WRX \u0026 STI (EJ)","description":"\u003ch2\u003eCP Pistons Subaru WRX \u0026amp; STI (EJ)\u003c\/h2\u003e\n\u003cp\u003eCP Pistons parts for the Subaru WRX \u0026amp; STI (EJ). Check the fitment details on each listing to confirm your chassis code before ordering; installation by a professional is recommended.\u003c\/p\u003e\n\u003cp\u003eNeed help choosing? Contact our team at \u003ca href=\"mailto:sales@chicaneaustralia.com.au\"\u003esales@chicaneaustralia.com.au\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"cp-pistons-subaru-ej257-wrx-sti","title":"CP Pistons Forged Pistons – Subaru EJ257","description":"\u003cdiv style=\"max-width: 800px; margin: 0 auto; line-height: 1.6;\"\u003e\n\u003ch2\u003eCP Pistons – Subaru EJ257 WRX STI Forged Piston Set (79mm Stroke)\u003c\/h2\u003e\n\u003cp\u003eBuilt for serious turbocharged Subaru EJ257 applications, the \u003cstrong\u003eCP Pistons Forged Piston Set\u003c\/strong\u003e offers race-proven reliability and precision. Manufactured from high-strength aluminium and designed for a 79 mm stroke and 130.5 mm rod length, this piston series suits aggressive street, time attack, and track builds demanding a strong and lightweight rotating assembly.\u003c\/p\u003e\n\u003cp\u003eThese pistons feature deep valve reliefs, anti-detonation grooves, and fully CNC-machined domes for consistent combustion, optimised flow, and maximum durability under boost.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for EJ257 engines with 79 mm stroke\u003c\/li\u003e\n  \u003cli\u003eForged aluminium for high strength and reduced weight\u003c\/li\u003e\n  \u003cli\u003eWide range of compression ratios (8.2, 8.4, 9.0, 10.0)\u003c\/li\u003e\n  \u003cli\u003eAvailable in standard and oversized bore diameters\u003c\/li\u003e\n  \u003cli\u003eSupplied with pins, rings, and locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Variants\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eVariant\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003ePart #\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eCR\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eDome\/Dish (cc)\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eBore (mm)\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eWeight (g)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.50mm \/ CR 8.2\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7420\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.2:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-21.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e392\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.50mm \/ CR 9.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7425\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e9.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-14.20\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e401\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.50mm \/ CR 10.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7415\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e10.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-7.40\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e438\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.75mm \/ CR 8.2\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7422\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.2:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-21.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.75\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e392\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.75mm \/ CR 9.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7426\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e9.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-14.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.75\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e404\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.75mm \/ CR 10.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7416\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e10.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-7.40\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e99.75\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e439\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00mm \/ CR 8.2\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7421\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.2:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-21.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e408\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00mm \/ CR 9.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7427\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e9.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-14.90\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e408\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00mm \/ CR 10.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7417\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e10.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-6.30\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e440\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.50mm \/ CR 8.2\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7423\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.2:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-23.10\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e393\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.50mm \/ CR 9.0\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7428\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e9.0:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-15.60\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e399\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00mm \/ CR 8.4\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7431\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.4:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-6.93\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e100.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e440\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eTechnical Overview\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eStroke: 79 mm\u003c\/li\u003e\n  \u003cli\u003eRod Length: 130.5 mm\u003c\/li\u003e\n  \u003cli\u003eCompression Height: 1.208 in\u003c\/li\u003e\n  \u003cli\u003eWrist Pin: 23 mm (0.9055 in), included – \u003cem\u003e905-2500-18CP1S\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003eRing Pack: 1.0 mm \/ 1.2 mm \/ 2.8 mm – \u003cem\u003e905x055 SUB\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003eLocks: Spiral locks (part numbers vary)\u003c\/li\u003e\n  \u003cli\u003eVehicle Fitment: Subaru EJ257 WRX STI\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"CP Pistons","offers":[{"title":"99.50mm \/ CR 8.2","offer_id":50630039798053,"sku":"SC7420","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.50mm \/ CR 9.0","offer_id":50630039830821,"sku":"SC7425","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.50mm \/ CR 10.0","offer_id":50630039863589,"sku":"SC7415","price":1639.0,"currency_code":"AUD","in_stock":true},{"title":"99.75mm \/ CR 8.2","offer_id":50630039896357,"sku":"SC7422","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.75mm \/ CR 9.0","offer_id":50630039929125,"sku":"SC7426","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.75mm \/ CR 10.0","offer_id":50630039961893,"sku":"SC7416","price":1639.0,"currency_code":"AUD","in_stock":true},{"title":"100.00mm \/ CR 8.2","offer_id":50630039994661,"sku":"SC7421","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.00mm \/ CR 9.0","offer_id":50630040027429,"sku":"SC7427","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.00mm \/ CR 10.0","offer_id":50630040060197,"sku":"SC7417","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.50mm \/ CR 8.2","offer_id":50630040092965,"sku":"SC7423","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.50mm \/ CR 9.0","offer_id":50630040125733,"sku":"SC7428","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.00mm \/ CR 8.4","offer_id":50630040158501,"sku":"SC7431","price":1799.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/2943\/6709\/files\/image_1b2ed327-a593-4c57-af57-6279ba2ce225.png?v=1750473664"},{"product_id":"cp-pistons-subaru-ej20-wrx-ej205","title":"CP Pistons Forged Pistons – Subaru EJ20 \/ EJ205","description":"\u003cdiv style=\"max-width: 800px; margin: 0 auto; line-height: 1.6;\"\u003e\n\u003ch2\u003eCP Pistons – Subaru EJ20 WRX Forged Piston Set\u003c\/h2\u003e\n\u003cp\u003eCP Pistons' \u003cstrong\u003eforged piston range for Subaru EJ20 \u003c\/strong\u003eis engineered for turbocharged high-performance builds demanding superior strength and reliability. Designed for a 75 mm stroke and 130.5 mm rod length, these pistons are perfect for street and track setups running elevated boost, RPM, or aggressive tuning.\u003c\/p\u003e\n\u003cp\u003eEach piston is CNC-machined from high-strength forged aluminium, featuring an optimised skirt profile and valve reliefs for excellent sealing, efficiency, and durability. Offered in multiple bore sizes with consistent compression ratio (8.5:1), this set caters to rebuilds and oversized applications.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for Subaru EJ20 WRX and EJ205 engines\u003c\/li\u003e\n\u003cli\u003eDesigned for 75 mm stroke and 130.5 mm rod length\u003c\/li\u003e\n\u003cli\u003eForged from high-strength aluminium for superior performance\u003c\/li\u003e\n\u003cli\u003eCompression ratio of 8.5:1 – ideal for forced induction\u003c\/li\u003e\n\u003cli\u003eBalanced weight and optimised dome for power and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAvailable Variants\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eVariant\u003c\/th\u003e\n\u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003ePart #\u003c\/th\u003e\n\u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eCR\u003c\/th\u003e\n\u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eDome\/Dish (cc)\u003c\/th\u003e\n\u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eBore (mm)\u003c\/th\u003e\n\u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eWeight (g)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e92.00mm \/ CR 8.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7399\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-8.15\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e92.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e359\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e92.50mm \/ CR 8.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7400\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-8.26\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e92.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e365\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e93.00mm \/ CR 8.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSC7401\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-9.50\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e93.00\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e378\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical Overview\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStroke: 75 mm\u003c\/li\u003e\n\u003cli\u003eRod Length: 130.5 mm\u003c\/li\u003e\n\u003cli\u003eCompression Height: 1.285 in\u003c\/li\u003e\n\u003cli\u003eWrist Pin: 23 mm (0.9055 in), included – \u003cem\u003e905-2500-18CP1S\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eRing Pack: 1.0 mm \/ 1.2 mm \/ 2.8 mm – \u003cem\u003e905x055 SUB\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eLocks: Spiral locks – part numbers vary per piston (e.g. R51313-3622-0)\u003c\/li\u003e\n\u003cli\u003eFitment: Subaru EJ20 WRX \/ EJ205\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"CP Pistons","offers":[{"title":"92.00mm \/ CR 8.5","offer_id":50630040224037,"sku":"SC7399","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"92.50mm \/ CR 8.5","offer_id":50630040256805,"sku":"SC7400","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"93.00mm \/ CR 8.5","offer_id":50630040289573,"sku":"SC7401","price":1799.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/2943\/6709\/files\/image_1b2ed327-a593-4c57-af57-6279ba2ce225.png?v=1750473664"},{"product_id":"cp-pistons-subaru-ej257-wrx-sti-stroker","title":"CP Pistons Forged Pistons (Stroker) – Subaru EJ257","description":"\u003cdiv style=\"max-width: 800px; margin: 0 auto; line-height: 1.6;\"\u003e\n\u003ch2\u003eCP Pistons – Subaru EJ257 WRX STI Stroker Forged Piston Set\u003c\/h2\u003e\n\u003cp\u003eEngineered for high-performance stroker applications, the \u003cstrong\u003eCP Pistons EJ257 WRX STI Piston Set\u003c\/strong\u003e delivers exceptional strength, reliability, and sealing under high boost, high RPM, and race conditions. Designed to work with an 83 mm stroke and 130.5 mm rod length, these forged pistons suit aggressive street and motorsport Subaru EJ257 builds.\u003c\/p\u003e\n\u003cp\u003eEach piston is manufactured from high-strength aluminium, CNC-machined for precision, and balanced for consistency. Available in multiple bore sizes and compression ratios to suit a variety of tuning goals.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for EJ257 stroker builds with 83 mm stroke\u003c\/li\u003e\n  \u003cli\u003eForged construction for superior strength and heat resistance\u003c\/li\u003e\n  \u003cli\u003eMatched weight and balanced for high-RPM performance\u003c\/li\u003e\n  \u003cli\u003eOptimised skirt design for reduced friction and wear\u003c\/li\u003e\n  \u003cli\u003eCompatible with 130.5 mm rods and 23 mm wrist pins\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Variants\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eVariant\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003ePart #\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eCR\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eDome\/Dish (cc)\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eBore (mm)\u003c\/th\u003e\n  \u003cth style=\"text-align: left; border-bottom: 1px solid #ccc; padding: 8px;\"\u003eWeight (g)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.50mm \/ CR 8.5\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7433\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-22.10\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.50\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e391\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.75mm \/ CR 8.5\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7434\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-22.49\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.75\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e396\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.75mm \/ CR 9.0\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7438\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e9.0:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-17.10\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.75\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e393\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.75mm \/ CR 10.0\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7442\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e10.0:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-8.08\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e99.75\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e395\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e100.00mm \/ CR 8.5\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7435\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-22.90\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e100.00\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e398\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e100.00mm \/ CR 9.0\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7439\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e9.0:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-17.50\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e100.00\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e398\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e100.50mm \/ CR 8.5\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003eSC7436\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e8.5:1\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e-23.70\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e100.50\u003c\/td\u003e\n  \u003ctd style=\"padding: 8px;\"\u003e377\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eTechnical Overview\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eStroke: 83 mm (stroker application)\u003c\/li\u003e\n  \u003cli\u003eRod Length: 130.5 mm\u003c\/li\u003e\n  \u003cli\u003eCompression Height: 1.123 in\u003c\/li\u003e\n  \u003cli\u003eWrist Pin: 23 mm (0.9055 in), included – \u003cem\u003e905-2500-18CP1S\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003eRing Pack: 1.0 mm \/ 1.2 mm \/ 2.8 mm – \u003cem\u003e905x055 SUB\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003eLocks: Spiral locks – part numbers vary per piston (e.g. R61568-3917-0)\u003c\/li\u003e\n  \u003cli\u003eCompatible with EJ257 WRX STI engines (stroker builds)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"CP Pistons","offers":[{"title":"99.50mm \/ CR 8.5","offer_id":50630040322341,"sku":"SC7433","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.75mm \/ CR 8.5","offer_id":50630040355109,"sku":"SC7434","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.75mm \/ CR 9.0","offer_id":50630040387877,"sku":"SC7438","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"99.75mm \/ CR 10.0","offer_id":50630040420645,"sku":"SC7442","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.00mm \/ CR 8.5","offer_id":50630040453413,"sku":"SC7435","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.00mm \/ CR 9.0","offer_id":50630040486181,"sku":"SC7439","price":1799.0,"currency_code":"AUD","in_stock":true},{"title":"100.50mm \/ CR 8.5","offer_id":50630040518949,"sku":"SC7436","price":1799.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/2943\/6709\/files\/image_1b2ed327-a593-4c57-af57-6279ba2ce225.png?v=1750473664"},{"product_id":"cp-pistons-ring-set-ej255-ej257-engine-100mm-bore-single-piston","title":"CP Pistons Ring Set – EJ255 \/ EJ257 Engine – 100mm Bore (Single Piston)","description":"\u003ch3\u003ePrecision-Engineered Piston Rings\u003c\/h3\u003e\u003cp\u003eCP Pistons ring set designed for EJ255 and EJ257 engines with 100mm bore. Built for high-performance and forced induction applications where reliability and ring seal are critical.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore size:\u003c\/strong\u003e 100mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine compatibility:\u003c\/strong\u003e EJ255 \/ EJ257\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Single piston ring set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e RS1658-3937-0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Premium steel construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Low-tension for reduced friction and improved sealing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible CP Pistons\u003c\/h3\u003e\u003cp\u003eThis ring set fits the following CP Pistons part numbers:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSC7431\u003c\/li\u003e\n\u003cli\u003eSC7421\u003c\/li\u003e\n\u003cli\u003eSC7427\u003c\/li\u003e\n\u003cli\u003eSC7417\u003c\/li\u003e\n\u003cli\u003eSC7435\u003c\/li\u003e\n\u003cli\u003eSC7439\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCP Pistons quality\u003c\/strong\u003e – proven in motorsport and high-performance builds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100mm bore fitment\u003c\/strong\u003e – compatible with oversized piston applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-tension design\u003c\/strong\u003e – reduces friction while maintaining excellent ring seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat-treated steel\u003c\/strong\u003e – withstands high cylinder pressures and temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement\u003c\/strong\u003e – works with CP Pistons and compatible aftermarket pistons\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eSubaru EJ255 \/ EJ257 engines (100mm bore):\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWRX STI VA (2015-2021)\u003c\/li\u003e\n\u003cli\u003eWRX STI GV \/ GR (2008-2014)\u003c\/li\u003e\n\u003cli\u003eWRX STI GDB \/ GC (1994-2007)\u003c\/li\u003e\n\u003cli\u003eWRX GH \/ GE \/ GDB \/ GDA \/ GC (1992-2014)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Sold as a single piston ring set. Order quantity required for your build (typically 4 sets for a complete engine rebuild).\u003c\/p\u003e\u003cp\u003eAustralian stock with local warranty support through Chicane Australia.\u003c\/p\u003e","brand":"CP Pistons","offers":[{"title":"Default Title","offer_id":51945257795877,"sku":"RS1658-3937-0","price":51.25,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/2943\/6709\/files\/CP-Pistons-ring-set-sportignition-600x600.jpg?v=1769629925"}],"url":"https:\/\/www.chicaneaustralia.com.au\/collections\/cp-pistons-subaru-wrx-sti-ej.oembed","provider":"Chicane Australia","version":"1.0","type":"link"}