questions/tips for my 2004 wrx small upgrades.

[n3wWRXown3r]

I just want to do some small upgrades to my 04 WRX like a full exhaust and cool air intake and little things like that. I found a guy that has a brand new STI turbo he will seal me will it bolt up to my existing stock manifold? And names of good slightly cheaper performance parts will help! Thank you!

[EJ257]

You'll need to modify the ECU mapping for the exhaust.

You should get a catless uppipe (no tuning needed, just a resistor to get rid of the DTC associated with the EGT sensor you remove). The stock catted one is a blown turbo waiting to happen, when the cat shreds apart and gets sucked into it.

You're fuel-limited to your stock turbo; you cannot upgrade turbos without also addressing the fuel injectors and pump.

A CAI will require additional tuning, as the MAF scaling will have to be adjusted.

[n3wWRXown3r]

Thank you for the help!! Now I know where to start!!