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The Mahle MS piston set is a pack of eight pistons for Chevrolet small‑block 391ci applications with a 4.145‑inch bore and 3.625‑inch stroke. Each piston matches a 6.125‑inch rod length, 0.927‑inch pin, and a 9.0cc crown volume producing a 13.6:1 compression ratio; individual piston weight is listed at 449g. These specifications suit high‑compression 391ci engine builds requiring exact dimensional match.
Mahle MS Chevrolet SB 391cid 4.145in Bore 3.625 Stroke 6.125 Rod 1.062R CH 13.6CR Pistons Set of 8
