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Mahle’s MS piston set for BBC 505ci engines provides eight pistons with a 4.350in bore, 4.25in stroke and a .990in wrist pin. Matched to 6.385in rods and an 18.0cc crown volume, these pistons yield about a 10.4:1 compression ratio. The kit supports big‑block Chevy engine assemblies where consistent piston dimensions and combustion volume are important for correct compression.
Mahle MS Piston Set BBC 505ci 4.350in Bore 4.25in Stroke 6.385in Rod .990 Pin 18cc 10.4 CR Set of 8
