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The Mahle MS piston set for BBC 498ci applications is an eight‑piece kit featuring a 4.320in bore, 4.25in stroke and a .990in wrist pin. With 6.385in rods and an 18.0cc crown volume producing roughly a 10.3:1 compression ratio, these pistons are intended for big‑block Chevrolet rebuilds where matching bore, rod length and combustion volume matters for targeted compression and assembly fitment.
Mahle MS Piston Set BBC 498ci 4.320in Bore 4.25in Stroke 6.385in Rod .990 Pin 18cc 10.3 CR Set of 8
