i have started to work on my auto. 2004 g35 coupe . i have a stillen cat back, injen cold air, and pulleys. i am about 250 hps. to the wheels, but my goal is 400 hp. any suggestions for the build up? also, has anyone been able to change out the shifter for something better?

 

I hope by build up you mean ultimately ending up with F/I or else this thread is just another "revelation" just like paranormals thread.

 

the best way to reach 400 hp is to go F/I. Otherwise you will have to spend much more money, and have a lot more down time.

 

your goal is 400hp? that's a good start.now the next question is what's your budget?
go to Forced Induction forum and start reading.do some reseach on your own first.good luck

 

you have 250rwhp???!! thats funny, is that ricer math or actually dyno.

 

that is dyno after the mods listed, stock was 220 to the wheels.

 

do you have these dyno's that showed a 30rwhp increase with I/E and pulleys?