BMW N54 JB4 Performance Tuner - 135i, 335i, 1M, 535i, X6, Z4 Connection Type:JB4 Only in fact it's quite hot

in fact it's quite hot

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

100whp* (Rated for 950whp on 100% E85)

5 (6 LPM): Our Stage 3

All of our complete kits include the following:

BMW N54 JB4 Performance Tuner - 135i, 335i, 1M, 535i, X6, Z4 Connection Type:JB4 Only in fact it's quite hotHow about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild. In addition to several performance maps which can be