{"product_id":"80-inch-evolution-piston-kit-standard","title":"80 inch Evolution Piston Kit Standard","description":"\u003cp\u003eKeith Black piston set is standard size and is for a 3.498 inch bore. Piston set has a compression of 9.6:1 and includes rings.\n\u003cbr\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 standard size  for a 3.498 inch bore and has a 9.5:1 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. \n\u003cbr\u003e Instructions: http:\/\/www.vtwinmfg.com\/Instructions\/MS\/KB Conversion Piston Guide and Fitment.pdf\u003c\/p\u003e","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":67622838468793,"sku":"11-2257","price":325.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/0179\/2441\/files\/11-2257.jpg?v=1790864345","url":"https:\/\/www.thespeedshopusa.com\/products\/80-inch-evolution-piston-kit-standard","provider":"THE SPEED SHOP USA","version":"1.0","type":"link"}