ok guys so im a proud owner of an april 07 hawkeye wrx 2.5 and was wondering what bhp gains can i expect spending around £800 considering ive already put a cat-back exhaust on it?
information im looking for is which ecu is the most popular used in scoobies etc?

 

Ecutek remap is the best way to go for the money,

If you're still under warranty then PPP from a dealer

 

PPP from a dealer for that year of car with warranty - £1000.

 

Probably the best option. Don't SIDC have a reduced priced WRX PPP!?!?

A remap is circa £650, which leaves you no money for any other mods, unless you can source a decat downpipe for £130 and a panel filter for £20