S55 CNC Cylinder Head Porting ZZII 5150 recommends O-Ringing the engine

5150 recommends O-Ringing the engine block or cylinder head to ensure maximum sealing

this combo delivers the strength and reliability your build demands

Performance depends on vehicle modifications and tuning

Water Jackets: Four large ports for enhanced cooling

8 oz fluid reservoir

S55 CNC Cylinder Head Porting ZZII 5150 recommends O-Ringing the engine5150 AutoSport 5 Axis CNC Cylinder Head Porting for BMW S55 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