{"product_id":"forged-piston-set-4-211-bore-flat-top","title":"Forged Piston Set, 4.211\" Bore, Flat-Top","description":"The Butler ROS-BU4254211-8 is a set of 8 forged pistons, co-developed by Butler Performance and ROSS Racing Pistons, specifically for traditional Pontiac engines. Unlike generic pistons often based on Chevy forgings, these utilize a true \"Pontiac\" forging for optimal fit, reduced weight, and increased strength. The strut-style design further contributes to their lightweight yet robust construction.\n\nManufactured from 2618-T61 billet bar stock, these pistons offer superior fatigue resistance and durability, making them suitable for both high-performance street applications and all-out racing. This material is chosen for its ability to withstand extreme stress and high RPMs without \"skirt shrinking,\" unlike brittle high-silicon pistons. The pistons feature a flat-top design with an 8cc chamber volume, a 4.211\" bore, and are designed for a 4.250\" stroke and 6.800\" rods, with a .990\" x 2.500\" pin diameter.\n\nRing set options, including 1\/16 1\/16 3\/16 configurations, are available for customization. Recommended accompanying parts include Total Seal ring sets and Clevite rod bearings.","brand":"Butler","offers":[{"title":"Default Title","offer_id":52687323824440,"sku":"ROS-BU4254211-8","price":749.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660191065.jpg?v=1784882684","url":"https:\/\/store.motormia.co\/products\/forged-piston-set-4-211-bore-flat-top","provider":"MOTORMIA","version":"1.0","type":"link"}