to what the 135i comes with.? Don't ask why I didn't get the 135i in the first place cause I got it for a present. What parts will I need and how much will each cost? I'm sure the turbocharger costs the most! What if instead I put a supercharger in it, will the car run better, better or worse gas mileage, better or worse maintenance? I'm just curious and really appreciate if someone can give me some thorough answers.
Thanx Alot!
...Or will it be cheaper to pay off the 128i(probably 5-6 years) and then trade it in for a new or used 135or 335i?