{"product_id":"hypereutectic-piston-set","title":"Hypereutectic Piston Set","description":"The KB Performance hypereutectic piston set is constructed from 390 aluminum alloy and heat-treated to T6 standards, resulting in a 30 percent increase in strength compared to standard untreated hypereutectic pistons.\n\nDesigned for performance applications, these pistons boast 100 percent CNC-machined crowns, a high upper compression-ring location, a gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves. The lightweight, rigid-rib skirt design ensures stability within the cylinder bore, leading to improved oil control, reduced blow-by, and extended ring life, while also eliminating cold start-up knocking.\n\nThese pistons are specifically designed for Mopar Big Block RB engines with a 440 cubic inch displacement (7.2L). They feature a bore size of 4.32 inches (109.7mm) and a stroke of 3.75 inches (95.3mm), with a compression height of 2.067 inches (52.5mm). The crown offers +9cc volume, contributing to a compression ratio range of 72-11.2 to 88-9.6 depending on the specific setup. The ring pack is 5\/64, 5\/64, 3\/16, and they utilize a 1.094-inch press-fit or floating pin.","brand":"KB Pistons","offers":[{"title":"Default Title","offer_id":52662807953720,"sku":"UEMKB237","price":426.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687499161.jpg?v=1784321215","url":"https:\/\/store.motormia.co\/products\/hypereutectic-piston-set","provider":"MOTORMIA","version":"1.0","type":"link"}