I have a few mods on my 05WRX and may have the opportunity to get a couple more cheapish..

My question is what sort of performance increase will I get from these modifications?

So far my car is as follows:

05 WRX 37k
PPP ECU
PPP Intercooler Hose
PPP Back Box and Decat Centre Section

If I then put the following on:

DeCat Up Pipe
PPP Sti Downpipe
Fuel Pump
STi Intercooler
REMAP

How much more power would I get and more importantly how much better will it drive and compare to say a Sti? A friend of mine has changed a "Restrictor pill?" and his boost has increased to 0.9bar, his car is a standard WRX and it now keeps up with mine for a £2 item!? (prob not safe im guessing)

I already have the car looking how I want and have Prodrive wheels, Prodrive Spoiler, suspension all set up, Brembo’s all round etc so im just thinking few a few hundred pounds if I could have a noticeable increase in performance maybe il stick with my WRX rather than shed out an extra 4k to get a nice 06Sti.

Cheers

 

Not really worth doing IMO unless you go for a different turbo. TD04 will restrict you to about 280 bhp.