JE Pistons BBC BIG CHIEF W/NOS Set of 8 Pistons

Premium forged racing pistons for domestic applications, engineered, forged, and machined 100% in the USA. Designed for specific engine and racing applications for durability and performance. This set of 8 pistons is for Chevrolet Big Block engines with Big Chief, Big Duke, or GP 18° cylinder heads. They feature a 4.600" bore, 1.120" compression height, +13.00cc dome volume, and are compatible with a 4.250" crankshaft stroke and 6.535" rod length. Crafted from 2618 forged material, these pistons are built to withstand extreme conditions and accept oversized valves and long duration, tight lobe separation roller cams. They include forced pin oilers, annular oil reservoirs, double Spiro locks, vertical gas ports, and oil rail supports.