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Mahle's MS piston set for GM LSX 438 ci is an eight‑piston kit sized to a 4.125 in bore and a 4.125 in stroke for big‑displacement LSX builds. The set pairs with 6.125 in rods and 0.927 in wrist pins and targets an 11.1:1 compression ratio. Extended notes show about a 426 g piston mass and 4032 alloy construction to balance strength and thermal stability in large‑bore applications.
Mahle MS Piston Set GM LSX 438ci 4.125in Bore 4.1in Stk 6.125in Rod .927 Pin -8cc 11.1 CR Set of 8
