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The Mahle MS piston set for small-block Ford 394ci applications is a matched eight-piston kit intended to restore displacement and compression in SBF builds. It’s sized for a 4.040 in bore with a 3.850 in stroke to reach the listed 394–395 cid. Pistons are specified as 4.040 x 1.600CH, fitted to a 5.956 in rod with a 0.912 in pin, carry -26cc crown volume and a 9.2:1 compression ratio.
Mahle MS Piston Set SBF 394ci 4.040in Bore 3.85in Stroke 5.956in Rod .912 Pin -26cc 9.2 CR Set of 8
