I'm looking for a 4" diesel muffler that will calm the noise level down on my truck a bit. Since the addition of the larger turbo, the sound has gotten a little rediculous, and not in a good way. I need somethign that will mellow it out a bit. Right now, I have no cat and a single 4" in/out MBRP aluminuzed muffler. It's the ones with the little scallops on the inside that don't look like they'd do much. I'm considering a singe long, or a pair of shorter Borla XR1s, but wanted to get some opinions first.

Thanks!!

I have the 4'' Corsa and love it!I didn't want the noise but wanted the free flow.It's not noisey at all and really sounds like the stock exhaust.

Aero-Turbine 4040L Exhaust (very quiet) - sounds just like stock but 4"

Thanks guys. Do you know if either of those companies sell their mufflers separately??

I heard that tts exhaust is very quiet aslo, look under vendor and they are there

http://www.dieselplace.com/forum/vendor_redirect.php?id=1
TTS is the quietest exhaust, good fit. Installed in 45 min. laying on ground. Thay are in So. Cal.

http://www.aeroperformanceexhaust.com/products.htm

order direct