BMW F8x M3/4 M4GTS Gearbox Software Model-M135i N55 F20 Lifetime warranty on materials and

Lifetime warranty on materials and craftsmanship (excluding race/track use)

9 Strength Rating)

We have our own in house hub dyno suitable for both FWD and RWD cars

to put the driver in total control

👉 The perfect choice for F2x owners who want braking performance to match their car’s power and handling

BMW F8x M3/4 M4GTS Gearbox Software Model-M135i N55 F20 Lifetime warranty on materials andDCT GTS Calibration Upgrade 90 (Workshop Install only) Improved downshifts to become more seemless Faster Up shift engagement Improved Sport Sport+ Modes GTS differential calibration optional The F8x GTS DCT caliberation upgrade does not interfere with any engine tuning you may have.