[Kalem]

I was told by Terry at burger tuning that JB for 528i is also compatible with 520i. I also notice some distributors are selling JB for the 520i such as Boss Motorsports at BMW-SG. What worries me to try is they don't officially list it at Burger Tuning website that it is compatible and list what sort of gain it will delivers. Anyone had tried the JB on 520i or 320i, thank you very much for your input.