{"product_id":"hypereutectic-piston-set-3-940-inch-bore","title":"Hypereutectic Piston Set, 3.940-inch Bore","description":"The Keith Black KB399-030 is a set of eight hypereutectic pistons designed for Small Block Mopar engines. These pistons feature a 3.940-inch bore, a 1.81-inch compression height, and a 25.0mm pin diameter. The ring groove configuration is 5\/64 x 5\/64 x 3\/16 inches, and the piston volume is a plus 6.00 cc.\n\nDespite their light weight, they are robust enough to handle high compression and elevated temperatures. The design incorporates race-ready features, including elevated upper compression-ring locations, gas-accumulator grooves for enhanced performance, drilled oil returns for better lubrication, and spiral-lock retainer grooves for secure installation.\n\nThese pistons are suitable for a variety of popular engine makes and displacements, and are available in different compression ratios to meet diverse performance requirements. UEM, the manufacturer, operates under an ISO 9001:2015 certified Quality Management System, emphasizing product quality and reliability.","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":52662810083640,"sku":"KB399-030","price":404.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687499392.jpg?v=1784321254","url":"https:\/\/store.motormia.co\/products\/hypereutectic-piston-set-3-940-inch-bore","provider":"MOTORMIA","version":"1.0","type":"link"}