- Advanced, lightweight FSR forging that eliminates stress concentrations for superior strength. They are up to 20% lighter than traditional equivalent. High-silicon 4032 aluminum alloy is used for reduced piston-to-wall clearance and quiet operation. Accumulator grooves are for improved ring seal. They're designed for normally aspirated or moderate forced induction/nitrous applications. Now includes high performance skirt coating. Lightweight, low friction metric ring package 1.2mm top ring, 1.5mm Napier 2nd ring, 3.0mm standard tension oil ring included.
Compression Ratio with 64cc Head 12.1:1
SKU SRP-271066_1 Manufacturer SRP Vehicle Make Chevy SB Bore Size 4.155 Wrist Pin Size 0.927 Piston Material 4032 Forged Compression Height 1.125 Piston Ring Size 1.2 1.5 3.0mm Piston Type Dome Rod Length 6.125 Crankshaft Stroke 3.750 List price No