It is not required to remove the subframe to install the kit

Pulsar turbos

as used in the E46 M3

- Improved Block Stability and Rigidity: ARP Main Studs improve block rigidity and therefore stability

Lightly hand-thread each stud into the block

ReFlex+ Advanced I/O Integration | BMW N54 1300555 It is not required toThe ReFlex+ Advanced I O Integration module is designed for BMW N54 owners who demand precise control over every aspect of their performance build. More than an auxiliary injector controller, the ReFlex+ delivers advanced features typically found in high end standalone ECUsat a fraction of the cost. Whether running standalone tuning or fully integrated with CAN Bus platforms, the ReFlex+ gives you unmatched flexibility, precision, and reliability. Its