Hello,
I am currently he owner of a 94 WRX, with nothing more than a panel filter and cat back exhaust on it, its spotless and im not looking for huge power gains, but i am looking to make it a little more responsive, and reliable, what should i do to the car next along the lines of... Power FC... decat exhaust... Z4 ecu??? any opinions welcomed!

Cheers
Eoin

 

My mate has a 94 wrx with a Power fc,decat,HKS super drager backbox,uprated headers and a HKS induction kit and it makes around the 300bhp mark but this was already fitted when he bought it.
Try the decat first then see about the ecu (I decatted my 93wrx and it does feel quicker.
The power fc is about £500+ so it depends on how responsive you want the car to be compared to the money you want to spend