[cruiser_guy]

Originally Posted by 83bj60

cruiser_guy, I can't remember what your setup uses.... You have a turbo, do you actually use a muffler? If not, what was the difference in sound, could you describe it?

I have NO muffler, resonator or any other device to reduce noise output. From the turbo back it is simply pipe. The actual sound level is no worse than the OEM exhaust system during normal driving with the windows up (no throaty rumble or any other noise other than what you hear in a naturally aspirated 3B). I had the OEM exhaust before I went to the turbo. With the windows down when driving in a tunnel or next to a highway divider there is a definite throaty noise like what you'd hear from a Harley Davidson. You also get that noise if the tailgate is open because you're carrying something long.

Outside of the truck at idle you hear a more throaty noise at the back but otherwise it's not at all worse than OEM.

Depending on the turbo you may head it whine sometimes but that's at a very low level.

Remember the pipe from my turbo follows the original exhaust route so there are several bends involved. The noise output from a system that routes directly to the back or uses fewer bends my be different. Bends act to reduce noise travel down the pipe.

One change I had to make to the straight pipe system was the last hanger. There was so much thermal expansion occuring in the exhaust that the final support kept breaking. Eventually we went to a strip of rubber in the shape of a sideways "U" to allow the pipe the 1" or so of expansion travel needed from cold to hot. Otherwise the system has not had any work done to it in the 4/5 years since it was installed.