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Mahle piston set for BMW S65 B40 4.0L includes eight pistons at 92.50mm bore with a 75.2mm stroke, 140.7mm rod and 21mm pin. Each piston carries 12.2cc of combustion volume, weighs about 372g and is specified at a 12.3:1 compression ratio. The matched eight-piston set is built to Mahle MS standards for fit and repeatable performance in supported S65 configurations.
Mahle MS BMW S65 B40 4.0L 92.50mm x 27.3mm CH 12.2cc 372g 12.3CR Pistons (Set of 8)
