Speedmaster PCE305.1080.03 Compatible with Chevy SBC 383 ci 6.0" 4.030" 1.125" 0.927" Flat Top Coat Hyper Pistons

Hypereutectic pistons with anti-friction skirt coating are manufactured from a aluminum alloy which contains 16 percent silicon for greater strength and wear resistance. By combining the hypereutectic alloy with the permanent mold process, the piston is strong, lightweight, and thermally-efficient. These pistons run tighter piston-to-wall clearances, improving ring seal and longevity. They are ideal for street, bracket racers and oval track.