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Mahle MS piston set for Ford big-block applications lists a 4.44in bore and 4.500in stroke with an eight‑piston set. The specification includes a 6.7in rod and a 0.990in wrist pin, with a small negative piston volume and a 12.7:1 compression ratio indicated for this configuration. These MS pistons are engineered for large displacement V8 builds where specified dimensions are required.
Mahle MS Piston Set Ford 557ci 4.44in Bore 4.500in Stroke 6.7in Rod 0.990 Pin -3cc 12.7 CR Set of 8
