Im doing some research for him on mods for his car.. He has a 2003 WRX. Seems like the Intakes are tricky and should be choosen with caution and possibly get it tuned at the time its added. Looks like it cause a lean a/f mixture.

Im throwing some ideas and info his way but I have no practical experience with turbo 4 cylinders or WRX's.

Could u give me a some suggestions on where to start modding.
As far as ive read. Looks to spend under 2 grand on mods. keeping the stock turbo for now unless you have some ideas on the subject.

Thanks