Mahle Pistons 930203640 Forged 4-Valve Pocket Flat Top 4.040 Bore

Mahle pistons were designed as a completely finished drop in forged piston assembly. Other than filling the included performance piston ring set, everything is done for you. Mahle has over 80 plus years of piston manufacturing making pistons from OEM to formula 1 racing. Mahle uses only the best technology to make these pistons. Mahle pistons come standard with anti-friction skirt coating for reduced drag. They are designed for use in racing classes requiring 4-valve relief pistons and are forged from 4032 low expansion aluminum alloy for high strength and reduced piston to wall clearance. Forced Pin Oiling is used for increased wrist pin lubrication. Pin bores are CNC precision-machined. .927" High-Quality Steel Wrist Pin (118g), Performance 1.0, 1.0, 2.0mm rings, and Race Proven Round Wire Locks are included.

Compression Ratio with 64cc Heads 10.5:1.
***Replaces part number 930203640***