5150 AutoSport Pro-Xtreme Forged Pistons for BMW N55 Engines – Built for Extreme Power and Precision

Replacement of worn and failure-prone parts

Includes Spindles

Since the heat exchanger sits front and center in the M3's cooling stack

torque the bolts to 40 ft-lbs using ARP Ultra-Torque Fastener Assembly Lubricant

B48 CNC Cylinder Head Porting 11127831862 5150 AutoSport Pro-Xtreme Forged Pistons5150 AutoSport 5 Axis CNC Cylinder Head Porting for BMW B48 Engines Please note that price is based on customer providing disassembled, clean core. If you need help sourcing a core, please contact our sales team. Also note that this service includes a 1 2 week turnaround time for service completion, beginning when the 5150 Team receives your head. Investing in cylinder head porting for your high performance BMW engine enhances airflow efficiency for