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The Mahle MS piston set for GM LS 345 ci is an eight‑piston kit intended for LS engine rebuilds and swaps. Each piston is sized for a 3.898 in bore with a 3.622 in stroke, fitted to a 6.098 in rod and 0.945 in wrist pin, and tuned to a roughly 10.1:1 compression ratio. Extended data lists a 407 g mass and 4032 alloy construction to balance lightweight strength with thermal stability.
Mahle MS Piston Set GM LS 345ci 3.898in Bore 3.622in Stk 6.098in Rod .945 Pin -4cc 10.1 CR Set of 8
