Hey, I just dumped my supercharged v6 convertible 2000 mustang for a brand new 2008 wrx wagon and Im already in love. A buddy of mine just bought a MazdaSPEED3 and now I need to start modifying my car to keep up. The speed is quick out of the box, but I believe my WRX has much more potential with the AWD and larger engine. Is there anything I can do to get a 40 hp or so improvement over stock to help me out without voiding the warranty? Thanks all.