I made the below lsited numbers...with the lil mods I have

 

Screw the throttle body for now. You can spend that $300 much better elsewhere. I have the stock throttle body and heads and cam on my car

Edit: that is kind confusing, I have the stock throttle body with ported and polished heads and a HOTcam, seems to be ok for now.

 

Don't waste money on the pullies, TB or the MAf sensor. None of them are going to be worth much of anything. Get some hooker LT's and nice Cai and catback and you should have no problem hitting 300rwhp. With the extra money from not buying the other crap get a nice spring kit like the crane 10308 and a set of pro mag 1.6 rr's.

 

Yeah forget everything except the headers. Then get some 1.6 rr's. I would say you would put down about 295 - 305 if your a M6 and your car is running strong.