16+ Bmw M3 Jb4 Background. The jb4 is a plug and play tune for your turbocharged bmw. Comparing the horsepower of two similar cars 1.
Stage1 map adding approximately 40whp and 40wtq across the power band on pump gas.
Slightly more aggressive version of map 1 intended for vehicles with. Burger and vac ask you: Suitable for all stages and fuel mixtures. Bms s63tu jb4 tune obdii bmw m5/m6/x5m/x6m w/ bcm module.
