KB Hypereutectic Dome Piston Set - SB Chevy 283-400 - Bore Size: 4.040", Stroke: 3.250", Rod Length: 5.700" 921015 Big O Dragster Scoop

Big O Dragster Scoop

1974-1974 Plymouth Barracuda

Ergonomic grip with Momentary button

250 in Valve Stem

one LH and one RH

KB Hypereutectic Dome Piston Set - SB Chevy 283-400 - Bore Size: 4.040", Stroke: 3.250", Rod Length: 5.700" 921015 Big O Dragster ScoopKeith 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