KB Pistons Performance Hypereutectic Dished Piston Set - SB Chevy 283-400 - Bore Size: 4.030", Stroke: 3.480", Rod Length: 5.700"

Keith Black pistons have several important advantages over conventional alloy pistons. High silicon content yields superior thermal and wear characteristics, greater strength, scuff and seizure protection, and resistance to cracking. High silicon content also keeps heat in the combustion chambers, eliminating heat transfer and improving combustion. Pistons are machined for 5/64" top, 5/64" second and 3/16" oil ring unless noted. Sold in sets of eight with wrist pins (except Ford 2300cc, sold in sets of four).