Engine Piston Set (6 PCS) BMW 540i 640i 740i 840i X5 X6 X7 B58 3.0L

This set of six premium replacement pistons is engineered to restore the combustion integrity of the BMW B58 3.0L Turbo engine. As the primary component receiving the force of ignition, pistons must withstand extreme thermal expansion and high cylinder pressures. These pistons are precision-machined to factory specifications, ensuring perfect clearance within the cylinder bores to maintain optimal compression and minimize blow-by. Each piston is designed with advanced cooling galleries and reinforced ring lands to handle the stresses of turbocharged operation. Replacing the full set during an engine overhaul ensures balanced reciprocating weight and consistent performance across all cylinders, extending the service life of your BMW's straight-six powerplant.