Originally Posted by BAC5.2
If I were you, I'd spend as little as possible. Headgaskets and a timing-belt/water pump would only cost you a few hundred bucks if you can do the labor yourself or with your friend for a case of beer.
I wouldn't waste my time trying to build a high-power N/A. Anything, ANYTHING, you try to do to make more power out of an N/A will have a TERRIBLE ROI. There are people who have spent THOUSANDS, and make less power than a stock EJ20 WRX.
If you HAVE to spend the rest, invest in tires, brakes, suspension (in that order).
Otherwise save your money.
I agree with this man. Our engines are pretty much as maxed out as Subaru was able to do for them. Sometimes, its not about making big power, it's about taking the power & control that you have at the moment & using them as efficiently as possible. I'd save that $2K for the tires, brakes, & suspension, all of which will make your car feel & respond much better.