Mahle Pistons 930239625 Forged Dome BB Chevy 4.625 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. Forged from 4032 or 2618 aluminum alloys to suit specific needs for strength and durability. Forced Pin Oiler is used for increased wrist pin lubrication. Pin bores are CNC precision-machined. .990' High-Quality Steel Wrist Pin (145g), and Race Proven Round Wire Locks are included. Performance .043, .043, 3.0mm file-fit performance ring set not included.

Compression Ratio with 112cc Heads 16.8:1
Compression Ratio with 118cc Heads 15.7:1.
Note: Oil rail supports included.