Originally Posted by TahoeM3
You've heard of the M3 GTR, right?
The e46 M3 GTR is a purpose built GT race car. Every fin, angle, and bulge on it is purpose built for downforce, speed, and air friction reduction. There is a clear difference between the e46 M3 and the e46 M3 GTR.
Which brings me to the next point that BMW's GTR car is not a M3 but rather a e90 sedan. Now obviously there is a e9X M3 GTR coming since that is one of the reasons for the production M3 to move up to a V8. But if the majority of poeple wanted those crazy fins, which for any type of street use are absolutely useless, then I'm sure they would have added them.
I'd imagine if you drove a M3 around that looked like the above picture then you would probably get a lot of looks from people wondering where the fire is your trying to get away from.