KB Hypereutectic Dome Piston Set - SB Chevy 283-400 - Bore Size: 4.040", Stroke: 3.250", Rod Length: 5.700" 921015 curved blades to provide a

curved blades to provide a low profile (only 2 1/16" at widest point) for limited space applications

This kit allows you to effectively tune pump volume and fuel delivery rate

Performance Alky

1/2 in Bolts and Studs

12 x 11 x 12 in

KB Hypereutectic Dome Piston Set - SB Chevy 283-400 - Bore Size: 4.040", Stroke: 3.250", Rod Length: 5.700" 921015 curved blades to provide aKeith 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