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The Mahle MS piston set SBM for 344ci applications is an eight-piece matched piston kit intended for small-block mod builds. It’s sized for a 4.070 in bore with a 3.313 in stroke to produce the listed 344–345 cid while using a 6.123 in rod to set the assembly geometry. Pistons are specified as 4.070 x 1.804CH, use a 0.984 in pin, are listed at roughly -5.5cc crown volume and carry a 9.9:1 compression ratio with individual weight near 512 g.
Mahle MS Piston Set SBM 344ci 4.07in Bore 3.313in Stroke 6.123in Rod .984 Pin -5cc 9.9 CR Set of 8
