SRP Professional Forged Flat-Top Piston & Ring Kit - SB Chevy - 4.030" Bore, 3.750" Stroke, 6.000" Rod H76503FS A dash mounted control knob

A dash mounted control knob lets you adjust the amount of timing retard

All CSR spacers are machined for o-rings on both sides

77 in Square Port

Ideal for installing larger springs on GM Vortec head

and GP2 Youth

SRP Professional Forged Flat-Top Piston & Ring Kit - SB Chevy - 4.030" Bore, 3.750" Stroke, 6.000" Rod H76503FS A dash mounted control knobRevolutionary piston kits have modern racing pistons with low friction metric ring sets. Kits include lightweight forged ide relief (FSR) pistons, wrist pins with carbon steel wire locks, and JE Pro Seal premium piston ring set, complete with 1. 2mm premium steel top rings, 1. 5mm Napier second rings and 3. 0mm standard tension oil rings. SRP pistons are designed and manufactured using the same knowledge, expertise, and quality control that