G20 3 Series MP Style Carbon Fiber Rear Diffuser (M340i) lci mirror caps 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

Give your E90 M3 a more aggressive look with the V2 Carbon Fiber Diffuser

It’s offered with a variety of springs for different vacuum levels

Cloud based solution with a web based interface and mobile apps for iOS and Android

2019-2021 F87 M2 Competition / CS

G20 3 Series MP Style Carbon Fiber Rear Diffuser (M340i) lci mirror caps The JB4 tuner installs betweenAdd an aggressive and OEM+ touch to the rear of your G20 M340i with an mp style carbon fiber rear diffuser! Fitment: 2019+ G20 M340i 2x2 Carbon Fiber Weave High Gloss, UV Protected Clear Coat Professional Installation highly recommended *For best possible fitment, bumper may have to be removed for install