{"product_id":"1200cc-piston-set-030-oversize-keith-black-kb264-030-evolution-sportster-1988-2003","title":"1200cc Piston set.030 Oversize - Keith Black KB264.030 - Evolution Sportster 1988-2003","description":"\u003cp\u003e\u003cstrong\u003eKeith Black #:\u003c\/strong\u003e KB264.030\u003c\/p\u003e\n\u003cp\u003eKeith black flat top piston set is.030 oversize with a 9.0:1 compression ratio includes rings.\u003c\/p\u003e\n\u003cp\u003eThe Keith Black 390 hypereutectic alloy is cast in a permanent steel mold which makes it possible to build a light weight piston that makes more power and uses less fuel and lasts longer. Pistons are.030 oversize for a 3.528 inch bore and has a 9:1 compression ratio. The low heat transfer of the alloy keeps the skirts cool so piston expansion is minimal. The combination of a low heat transfer piston alloy and high compression ring placement increases power and economy. The high ring placement alone reduces detonation and increases the top ring temperature. **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e1988-2003\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/www.vtwinmfg.com\/Instructions\/MS\/KB%20Sym-Asym%20Piston%20Installation%20Guide.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation instructions (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":67549413179550,"sku":"11-2214","price":259.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1692\/2127\/files\/11-2214.jpg?v=1791652167","url":"https:\/\/chopcult.com\/products\/1200cc-piston-set-030-oversize-keith-black-kb264-030-evolution-sportster-1988-2003","provider":"ChopCult","version":"1.0","type":"link"}