I want to fit a decat up and down pipe to my 2004 WRX with a Prodrive Proformance pack. My question is will the prodrive ecu be ok with this or will it need a remap? and what increase in proformance can I expect?
Thanks all.

 

Can't remember whether or not the WRX PPP has sports cat in d/p or normal cat. If it has normal cat you may get 10 bhp by de-catting and spool up a few hundred rpm earlier. General opinion seems to be that de-cat u/p is a waste of money.

You would get away without a remap but if you do de-cat and remap you should see 270-280 bhp I reckon.

If the d/p on PPP is sports cat I wouldn't bother de-catting and just go for re-map.

HTH dnc

HTH

dnc

 

Thanks for the reply.
sport cat on a sti PPP. On the wrx PPP they remove the cat in the link pipe between the down pipe and centre section.

 

I went down the Milltek decat system with Ecutek remap as soon as the warranty expired on my 55plate WRX PPP. The difference is huge. Loads more mid range torque and better mpg!. Walbro fuel pump is a worthwhile investment to ensure sufficient fuelling.The only downside is that you will realise that the brakes are not upto it. I did mine first fortunately!

 

Did you replace the up pipe aswell?