well new pipes at least i used the stock mufflers and put a bullet cat on each side to keep it quiet and you cant hardly tell the exhaust tone is about the same as stock the dyno runs were in all the same conditions other than it was 10 degs hotter than all my other runs still got 13 hp and 11 ftlb at the wheels.i have a 2 1/2 inch pipe on each side going as far back as i could then put a y in to a 3 inch then y back out to 2 1/2.i would of had daul all the way back but i figured they might get to close to the floor pan and radle over bumps
http://i149.photobucket.com/albums/s...27-07_1047.jpg http://i149.photobucket.com/albums/s...13-07_0941.jpg http://i149.photobucket.com/albums/s77/stbtt/cai-ex.jpg