M156 CNC Ported Heads

Precision 5-Axis machined and fully blue-printed for extreme duty and highest power potential for your M156, our CNC Ported Heads are a must have when building your M156 equipped AMG. The team at Premier Tuning Group completes a full overhaul of your M156 head to transform it to 400+ CFM flow. Our engine build team goes the extra mile to give you not only a reliable head rebuild but also a completely reshaped port to perform both naturally aspirated and forced induction. The scrutinizing process includes, full disassembly, CNC porting, 5 angle valve job, high pressure cleaning, clean decking, new OEM valve seals, full check of springs and valves, valve height measurement, chamber CC check, and final assembly. Benefits Include: 400+ CFM Flow @ .550" Lift w/ 2.0" Exhaust Pipe 5-Axis CNC Ported Intake & Exhaust Ports Five Angle Valve Job Full Health Check of Head High Pressure Cleaned Clean Decked for Perfect Straightness New OEM Valve Seals This product requires a core exchange.