the fuel injector bores are 14mm ID so factory injectors can be used

transforming the performance of your E46 M3 or Z4M

these pistons are engineered to withstand extreme pressures and high RPMs

This will help it rotate into locking position

NMK Performance Tuning Package Breather the fuel injector bores areCustom Performance Tuning for BMW Competition & Off Road Vehicles Maximize your BMW's performance with an NMK Performance Custom Tuning Package, tailored specifically for competition and off road vehicles. As a part of this service, NMK works closely with drivers to tailor each tune according to their specific needs, wants, and goals, ensuring optimal performance and satisfaction. About NMK Performance Founded and run by dedicated automotive engineers