by HyRax » Mon Jul 28, 2014 12:09 am
If it were an MY07+ you could have tuned the ECU and gained 10% improvement in power and torque, making the car much more driveable and you can still have a lot of fun. Sadly, your MY04 ECU is not flashable - you'd have to go aftermarket.
If you had an H6 Liberty (which is P-Plater legal and flashable), a tune alone with no extra hardware mods makes the car more powerful than a stock WRX, and no-one would be the wiser.
If you like to DRIVE your car, however, then there's a host of mods you can do to improve handling and braking - swaybars front & rear, GT/Brembo brakes front & rear, STi master brake cylinder, braided brake lines, coilovers, etc. Check out my profile thread to see what I've done to my own 2.5i.
I was going to procrastinate, but I put it off...