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The Mahle MS piston set for GM LS 377 ci is delivered as an eight‑piston package, specified for a 4.070 in bore with a 3.622 in stroke and matched to 6.125 in rods and 0.927 in pins. Catalog notes indicate about a 12.2:1 compression ratio, with extended data listing a 492 g piston mass and 2618 alloy construction to support durability and consistent reciprocating dynamics in higher‑compression LS builds.
Mahle MS Piston Set GM LS 377ci 4.070in Bore 3.622in Stk 6.125in Rod .927 Pin 12cc 12.2 CR Set of 8
