Whats your advice guy's is there any point in fitting an STi intercooler to a 2004WRX without changing the bonnet scoop or should I keep the WRX intercooler and change the y-pipe for a Samco/Prodrive??

Other mods to be done at the same time are:-

Vf35
Walbro 255
Decat Up pipe
Sti Pinks
3"Exhaust with Sports Cat
PFR7B Plugs

Thanks for any advice!!

 

it's not so much the scoop mate , it's the rubber skirt on the underside , wrx is slightly smaller , so if you don't change that youre not gonna get max air flow into the slightly bigger Sti cooler

 

Go for the STI scoop and IC IMO. I did the same mods as you a while back all be it I'm running a VF34.

 

As tony said, the STI intercooler is larger so using the wrx undertray doesnt help cooling. 2nd hand STI undertrays can be had for around £30 or punch through the wrx one to help with getting more air into the bigger cooler.