{"product_id":"spi-040-over-bore-piston-kit-for-polaris-550-fan-cooled-1999-2021-74mm","title":"SPI .040 Over Bore Piston Kit for Polaris 550 Fan Cooled 1999-2021 - 74mm","description":"\u003ch2\u003eSPI .040 Over Bore Piston Kit for Polaris 550 Fan Cooled\u003c\/h2\u003e\u003cp\u003eThis SPI .040 over bore piston kit is designed for Polaris 550 Fan Cooled engines from 1999 to 2021, featuring a 74mm bore diameter.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis piston kit from SPI is an .040 oversize replacement for Polaris 550 Fan Cooled engines. It includes a quality piston, rings, and wrist pin for a complete rebuild. The 74mm bore provides increased displacement for improved performance.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e.040 oversize for increased compression and power\u003c\/li\u003e\n\u003cli\u003eHigh-quality alloy construction resists heat and wear\u003c\/li\u003e\n\u003cli\u003ePrecision-machined piston skirts reduce friction\u003c\/li\u003e\n\u003cli\u003eIncludes high-tension rings for excellent seal\u003c\/li\u003e\n\u003cli\u003eWrist pin and circlips included for easy installation\u003c\/li\u003e\n\u003cli\u003eDesigned for Polaris 550 fan-cooled engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Polaris 550 Fan Cooled (1999-2021)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eEngine rebuild and overhaul\u003c\/li\u003e\n\u003cli\u003eRestore compression and performance to older engines\u003c\/li\u003e\n\u003cli\u003eOverbore maintenance for worn cylinders\u003c\/li\u003e\n\u003cli\u003eCustom engine builds for increased displacement\u003c\/li\u003e\n\u003cli\u003eRacing or high-performance applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 inches (1.02mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e74mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris 550 Fan Cooled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1999-2021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this piston kit include rings? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the kit includes a set of high-quality piston rings and a wrist pin with circlips.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this kit be used with a standard bore cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e No, this .040 over bore piston kit requires the cylinder to be bored to 74mm to fit properly.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44890809729110,"sku":"SZ1F13320","price":164.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_e65a4c8f-dd2d-4229-8c3d-7e514e9d0b5b.jpg?v=1781143972","url":"https:\/\/www.solidspare.com\/products\/spi-040-over-bore-piston-kit-for-polaris-550-fan-cooled-1999-2021-74mm","provider":"Solid Spare","version":"1.0","type":"link"}