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The Mahle MS forged piston set for GM LS 430ci engines is an eight‑piston replacement sized to a 4.135in bore with a 4.000in stroke. Each piston accepts a 0.927in wrist pin, uses a 6.125in rod and features a -3.0cc crown delivering roughly a 12.4:1 compression ratio. Individual pistons weigh about 441 g and are manufactured from 4032 alloy to preserve matched chamber volumes.
Mahle MS Piston Set GM LS 430ci 4.135in Bore 4in Stk 6.125in Rod .927 Pin -3cc 12.4 CR Set of 8
