JB4

Power gains of up to 100hp and 120wtq to the wheels on a stock truck without the risks of flashing! This plug and play tuner attaches to two easy to access sensors in the engine bay and works with...

Gains are up to 80whp/100tq on pump gas and up to 120whp/140wtq on higher octane or E85 mixtures without the risks of flashing! The ultimate tuner for your S55 powered vehicle, the JB4 allows you to...

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