Mahle MS Piston Set GM LS 428ci 4.130in Bore 4in Stk 6.067in Rod .927 Pin -3cc 12.2 CR Set of 8

The Mahle 930221530 piston set is a high-performance forged piston assembly designed for GM LS 428ci engines. It features a 4.130-inch bore, 4.000-inch stroke, and a 6.067-inch rod length. These flat-top pistons have a -2.5cc volume and an advertised weight of 450 grams per piston. They are forged from 4032 low expansion aluminum alloy for high strength and reduced piston-to-wall clearance. Key features include anti-friction skirt coating, forced pin oiling for increased wrist pin lubrication, and CNC precision-machined pin bores. The set includes a .927" high-quality steel wrist pin (118g), performance 1.0/1.0/2.0mm rings, and race-proven round wire locks. The compression ratio with 70cc heads is 11.8:1.