Take your turbo BMW M3/M4 and M2 Competition to the next level with JB4 The ultimate tune for your S55 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between. Made in USA. 5 Year Warranty. Fast Free Shipping on JB4 tuners.

The ultimate tune for your S58 powered G87 M2, G80 M3, and G82 M4, the JB4 allows you to go from factory stock to full race, and everywhere in between. Gains are 80whp/100wtq on pump gas and up to 150whp/175tq on higher octane or E85 mixtures.

JB4 Tuner, Intakes, and accessories for the 2021+ BMW G80 M3, BMW G82 G83 M4, and the all new 2023+ BMW G87 M2!

I recently did some testing in our JB4 Tuned 2022 BMW M4 Competition (AWD) and got a 10.2 @ 133.85 mph and 2.6 sec. 0-60 mph time. The only performance mods are JB4, BMS intakes, xHp, and E30 blend. xHP helped us get 0.2ths off the 1/4 mile with no loss of power on the shifts.

Mar 7, 2022 · The ultimate tune for your S58 powered G80 M3 and G82 M4, the JB4 allows you to go from factory stock to full race, and everywhere in between.

Tune your BMW S58 M2, M3, M4, X3M, or X4M with the JB4 tuner. The JB4 is loaded with great features and offers gains of 80+whp and 100+wtq.

Jan 23, 2024 · The JB4 is a piggyback tuner that plugs into your BMW's stock wiring and lets you modify the vehicle's computer for greater power. It's called a "piggyback" because it doesn't replace your ECU as a flash tune would.

Tune your BMW S55 M3. M4, or M2 Competition with the JB4. The JB4 tuner offers excellent features and power gains of 120whp and 140wtq.

The ultimate tuner for your S55 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between with the push of a button on your steering wheel or phone.

• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch • Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment • The JB4 offers a lot more performance, functionality, and safety than your average performance chip • Quick Plug & Play Installation