So i bought a catbypass pipe which was about 10 pounds lighter then the stock big bulky pipe. I had it installed and it barley even made a noise difference. However i do feel a greater increase in horse power and throttle response. IT feels like the acceleration is better. It might be due to me installing a K&N filter as well. Im hoping with these two mods my gas will get better by 5 MPGs. I also will be taking it back to that shop and the guy said he can put on a magnaflow muffler on for like 300 bucks. He stated turbo cars that have exhausts dont make as much noise from the exhaust as non turbo or supercharged cars. So im hopping the new mod will sound deeper and better and not like a freaking ricer.