Exact difference btw JB3 and J 4??
Ok...so probably a stupid and old question. I just bought a JB3 off a friend and am looking up info on it but all that comes up is JB4 stuff or JB4 (stage 3) info.
Is that what the JB3 actually is? A JB4 (stage 3) and the JB4 most ppl have these days is a JB4 (stage 4)??
I haven't had this car for too long and am new to all the tuning/mod. I'm planning on putting this JB3 in this weekend along with a DCI
2008 335i - JB4 / BMS DCI / Premium Package / Sport Package / 6AT