- The Mahle PowerPak was designed as a completely finished drop in piston assembly. Other then filling the included performance ring set, everything is done for you. Designed from 80+ years of piston manufacturing for everything from OEM to Formula1, only the best technology is used to make these pistons. They are forged from 2618 aluminum alloy for added detonation resistance. Forced Pin Oiling is used for increased wrist pin lubrication. Pin bores are CNC precision machined. .927" High Quality Steel Wrist Pin (118g), Performance 1.5, 1.5, 3.0mm rings, and Race Proven Round Wire Locks are included.
Compression Ratio with 64cc Heads 13.3
SKU SBC062155D04 Manufacturer Mahle Vehicle Make Chevy SB Bore Size 4.155 Wrist Pin Size 0.927 Piston Material 2618 Forged Aluminum Compression Height 1.062 Piston Ring Size 1.5 1.5 3.0mm Piston Type Dome +4cc Rod Length 6.000 Crankshaft Stroke 3.875 List price No