{"product_id":"2-spi-020-over-bore-piston-kits-for-polaris-550-fan-cooled-1999-2021-73-5mm","title":"2 SPI .020 Over Bore Piston Kits for Polaris 550 Fan Cooled 1999-2021 - 73.5mm","description":"\u003ch2\u003e2 SPI .020 Over Bore Piston Kits for Polaris 550 Fan Cooled\u003c\/h2\u003e\u003cp\u003eThese .020 over bore piston kits for Polaris 550 fan cooled engines (73.5mm) include two pistons, rings, pins, and clips for engine rebuilding.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThese piston kits for Polaris 550 fan cooled snowmobiles provide a .020 over bore (73.5mm) size to restore compression and performance. Designed for Polaris 550 fan cooled engines from 1999 to 2021, these kits offer a cost-effective rebuild solution. Each kit contains two pistons with rings, wrist pins, and circlips for a complete top-end overhaul.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e.020 over bore (73.5mm) for worn cylinder clearance\u003c\/li\u003e\n\u003cli\u003eIncludes two pistons with precision-machined ring grooves\u003c\/li\u003e\n\u003cli\u003eComplete set with rings, wrist pins, and circlips\u003c\/li\u003e\n\u003cli\u003eDesigned for Polaris 550 fan cooled engine specifications\u003c\/li\u003e\n\u003cli\u003eHigh-quality cast aluminum construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Polaris 550 Fan Cooled snowmobiles (1999-2021)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSnowmobile engine top-end rebuilds\u003c\/li\u003e\n\u003cli\u003eRestoring lost compression due to wear\u003c\/li\u003e\n\u003cli\u003eReplacing damaged or scored pistons\u003c\/li\u003e\n\u003cli\u003eRebuilding vintage Polaris 550 fan cooled engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e73.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 Kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e550 Fan Cooled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYears\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 Are these piston kits compatible with all Polaris 550 fan cooled models? \u003cstrong\u003eA:\u003c\/strong\u003e These kits are designed for Polaris 550 fan cooled engines from 1999 to 2021, but always verify your cylinder bore condition and serial number for exact fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to replace the piston rings separately? \u003cstrong\u003eA:\u003c\/strong\u003e No, each kit includes pistons, rings, wrist pins, and circlips—everything needed for a complete piston replacement.\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":44949783773270,"sku":"SZ1F14811","price":241.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_71dd2acc-f0f0-4695-bb19-bce5f3ad3cb5.jpg?v=1781398918","url":"https:\/\/www.solidspare.com\/products\/2-spi-020-over-bore-piston-kits-for-polaris-550-fan-cooled-1999-2021-73-5mm","provider":"Solid Spare","version":"1.0","type":"link"}