JB4 Tuners by BMS Available Now

JB4 for Infiniti shown with optional wireless connection.


JB4 is a plug & play chip tune available for turbocharged vehicles. The JB4 comes preloaded with custom tuning software and up to 8 maps for various fuel and modification levels. The JB4 installs between your car's sensor and its DME/ECU (computer) and manipulates vehicle performance through these connections. Installs and removes without a trace. 5-year warranty.

Made in the USA. 


Available now for many Turbo charged vehicles.

Available for:

Acura, Alfa Romeo, Audi, Aston Martin, BMW, Fiat, Ford, Genesis, Honda, Jeep 2.0, Kia, Lexus, Maserati, McLaren, Mercedes-Benz, Mini, Porsche, Toyota Supra, Volvo