Jb4 is a plug & play chip tune for turbocharged vehicles The differences between a jb4 vs flash tune and jb4 vs racechip explained in depth. The jb4 comes preloaded with custom tuning software and up to 8 maps for various fuel and modification.
1996 Ford Explorer with 15x8 -25 Pro Comp Series 51 and 33/12.5R15
The jb4 is a plug and play tuner that attaches to two easy to access sensors in the engine bay and works with your factory ecu tuning to remap your boost, timing, and fueling for optimal.
It is not a tune, but rather a way to make your factory tune do something it wouldn't ordinarily by tricking it
That said, it works very well with the.
