Does anyone know of some aftermarket exhausts or intakes available for the M3? How about a flash too?

Aftermarket exhausts are all over. I believe AA in Miami has one available (or soon), Eisenmann has one available, Supersprint has one available. You just have to look for them.

As for software ... that's a mighty good question. You may want to check out the thread further down about the pulley upgrade. Supposedly good power to be had there for cheap upgrade price.

The Eisenmann Race performance is my personal favorite system :)

http://www.youtube.com/watch?v=SVM6fWjNVEk

Does anybody know anything about the Meisterschaft exhaust. It looks great on the website but I really don't know anything about them as a company. When I was googling Eisenmann I found them.

Does anybody know anything about the Meisterschaft exhaust. It looks great on the website but I really don't know anything about them as a company. When I was googling Eisenmann I found them.

I like to stay away from drama. Just make sure you do a little research before buying the meister exhaust.

Also check out this link for the GruppeM intake http://www.m3post.com/forums/showthread.php?t=136722&highlight=GruppeM.

Here's my Eisenmann Sport Performance muffler--perfect if you don't want it super loud: http://forums.bimmerforums.com/forum/showthread.php?t=1041741&highlight=exhaust. Most mods are coming out now. Pulleys, software, wheels, etc.