I own a 92 325i and I have done the following engine upgrades already:
- cold air intake
- race headers
- topspeed catback exhaust
- autothority chip

I was thinking about putting in a bigger throttle body. I heard that this would give sunstential power gains. Has anybody experience with it? Should I go for the M3 throttle body or should I get mine bored out? Are there any good aftermarket parts?