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The Mahle MS piston set for small-block Ford 447ci applications is an eight-piece matched kit intended to rebuild displacement and maintain compression in large-displacement SBF engines. It’s specified for a 4.090 in bore with a 4.250 in stroke to reach the listed 447 cid. Pistons are described as 4.090 x 1.325CH, use a 6.700 in rod and a 0.990 in pin, carry -7cc crown volume and show a 11.3:1 compression ratio.
Mahle MS Piston Set SBF 447ci 4.090in Bore 4.250in Stroke 6.7in Rod .990 Pin -7cc 11.3 CR Set of 8
