Just installed invidia Catted downpipe, kartboy shifter bushings, kartboy rear endlinks w/ whiteline 22mm rear sway bar. The grin on my face was ear to ear. After I flashed to stage 2 on accessport it took about 10 mins to really start to feel the difference. The midrange is where I really felt it pull harder in gears 1-3. 4th and 5th not so much but a little ummph. Already had the mode short shifter and putting on the bushings made the shifts for a lack of a better term "crisp". The notchiness is 100% gone and can actually shift faster. I put the endlinks on the stiffest setting and was literally able to take corners about 5-7 mph faster than before. In addition I already had am aem cai and q300 exhaust. This is on an 11 wrx and definitely recommend to anyone these exact parts for a street/track car. Thanks for reading.