Bmw 335i Jb4 Tune. What is a jb4. The bmw n54 engine featured in the 135i 335i and 535i is one of the most tune able engines ever.
The jb4 is a plug and play tune available for turbocharged vehicles. Some people call it the 2jz of german engines but we think the n54 is on a whole new level. The bmw n54 engine featured in the 135i 335i and 535i is one of the most tune able engines ever.
The jb4 includes a simple plug and play installation harness and is compatible with all ecu versions and transmission.
N54 jb4 bmw performance tuner. N54 jb4 bmw performance tuner. How 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. What is a jb4.
