E92/E93 M3 GTS-V Style CF Rear Diffuser s55 The JB4 tuner installs between

The JB4 tuner installs between your cars sensors and it's DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster

It's the small details that make the biggest difference

you will be giving your 335i maximum airflow by removing any restriction the OEM connections may have on the charged air

We also offer a catted version of the X-pipe for those who do not want to go fully catless

*These tend to sell out fast

E92/E93 M3 GTS-V Style CF Rear Diffuser s55 The JB4 tuner installs betweenAdd a more aggressive touch to your E92 E93 M3 with this Carbon Fiber Diffuser! High Gloss Clear Coat Excellent Fitment Professional Installation Recommended