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The Mahle MS forged piston set for GM LS 428ci rebuilds is delivered as a matched eight‑piston package sized to a 4.070in bore and a 4.125in stroke with a 6.125in rod. Each piston accepts a 0.927in wrist pin and carries an -8.0cc crown corresponding to an approximate 10.8:1 compression ratio. Pistons weigh roughly 434 g and are produced in 4032 alloy for balanced chamber volumes.
Mahle MS Piston Set GM LS 428ci 4.07in Bore 4.1in Stk 6.125in Rod .927 Pin -8cc 10.8 CR Set of 8
