When re-tightening or reassembling

even under demanding conditions

Customers can choose between Cometic MLS or Athena-SCE Cut-Ring head gaskets and ARP2000 or Custom Age 625+ head studs

The external "RETURN" port is used for low pressure fuel returning from the FPR

5150 AutoSport Performance Cylinder Head Services for BMW S55 Engines

Genuine BMW VANOS Solenoid Valve, BMW N55 / S55 IV When re-tightening or reassemblingThe Genuine BMW VANOS Solenoid Valve is a critical component in the variable valve timing (VANOS) system for the N55 and S55 6 cylinder engines. This solenoid valve controls the variable timing of your camshaft, with one solenoid required per camshaft (2 for 6 cylinder engines). Key Features and Functions: VANOS System Control: The solenoid valve drives the VANOS system, ensuring precise timing adjustments for optimal engine performance. Performance