ARP High Boost Head Stud Kit** **it is a MUST to drill and tap the four outer 9mm holes in the engine block to increase their size to 11mm holes

F32 / F33 / F36 440i xDrive

Don't have a machine shop up to the job

Includes ARP rod bolts for added security at high RPMs

another 8AN PTFE fuel hose runs into the engine bay and towards the front of the fuel rail (not included)

ReFlex+ Advanced I/O Integration | BMW S55 3.0L ARP High Boost Head StudThe ReFlex+ Advanced I O Integration module is engineered for BMW S55 owners who want complete control over their performance builds. More than just an auxiliary injector controller, the ReFlex+ brings high end ECU features to your S55 at a fraction of the cost. Whether running standalone tuning or fully integrated with CAN Bus platforms, the ReFlex+ provides unmatched flexibility, precision, and reliability. Perfect for sequential port injection,