{"product_id":"forged-piston-kit-1","title":"Forged Piston Kit","description":"The Diamond Pistons 21405 is a forged piston kit specifically engineered for Buick 3800 L67 Series II engines. Constructed from a robust 2618 alloy, these pistons are built to withstand the demands of forced induction applications, particularly turbocharging.\n\nKey specifications include a 3.800-inch bore, a 3.400-inch crankshaft stroke, and a 5.640-inch rod length. The compression height is 1.205 inches, with the top ring positioned .240″ down from the piston crown. This kit includes premium 8620 wrist pins with a .155 wall and accommodates a standard 1.5x1.5x3mm ring package (rings not included). The calculated compression ratio with 62cc heads is 9.5:1, making it suitable for mild boost applications.\n\nDiamond Pistons, founded in 1968, has a long history of innovation in performance and racing piston design. This kit reflects that legacy, offering a reliable component for enthusiasts seeking to enhance their engine's performance.","brand":"Diamond Pistons","offers":[{"title":"Default Title","offer_id":52687697281336,"sku":"21405","price":847.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/664704107.webp?v=1784886231","url":"https:\/\/store.motormia.co\/products\/forged-piston-kit-1","provider":"MOTORMIA","version":"1.0","type":"link"}