I just got the 335i, while I'm super happy with its all round performance, I'd absolutely love to chip for more hp. In saying that, it has a mechanical warranty for 3 years so don't want to void this. I'd be fairly certain performance mods like this would be disallowed.
Does anyone know how closely the mechanics look (if at all) for unauthorized mods in the event of a breakdown?
Also, are aftermarket exhausts banned?
My mate has an X5 with 22s (cringe) and exhaust which was accepted by the warranty place, would I assume u can do the same without voiding it?
I would ask them but that might raise some sort of suspicion haha