CPU or Exhaust upgrades for 2.5 RS????

NA engines like those in the 2.5RS don't benefit much from a CPU (chip) upgrade. You'd be better off with some intake and exhaust mods. Try the NASIOC forums for more info.

You're not gonna get reliable 20% more hp with simple bolt ons. You bought the wrong car, or you need an engine swap. Why don't you spend a little for a sportier exhaust, then start making suspension, wheel and tire upgrades. Forget street racing and find a rallycross or autocross group in your area.

Carl

1 Lucky Texan

Shubaroo wrote:

You'd be hard pressed to get 200bhp out that engine under warranty. The UK STi's Prodrive Pack has a complete new exhaust system a revised ECU mapping high flow fuel pump and I believe tho not sure some modifications to the induction system. This only gives a warranty approved 39bhp increase from

261 to 300 and costs 2000GBP If your willing to throw your warranty away then im sure you could get the 200 without too much hassle but be prepared for problems... Remember the high performance engines such as the STi have very few parts in common with their lesser powered siblings (Sodium filled exchast valves etc). IIRC the UK STi engine is 80% sti parts, (please correct if wrong.) R