In Reply to: Re: Supercharged 1.9L v/s M Roadster? posted by Bruce Duvall on March 30, 1999 at 17:00:01:
1) Try 50~60 hp not 50% increasse (we have dyno to prove it)
2) You don't need a cat-back system (I don't have one thou I have a Supersprint on order)
3) You don't need to improve the brakes for the street (but 2.8 vented disks with 325i calipers bolt right on)
4) It is cheeper to do but if you are looking for a "lion-eater" better to go with the M.
Read my post bellow for my feelings on my supercharged 1.9.