When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have the mbrp muffler delete single outlet on my 08 6.7 and can hardly tell the muffler is gone. the filter and cat remove most of the noise.
other than all the pipe matching in size all the way out now and the stainless looking cool. it is only makes a tade more noise.
There is almost no sound gain at all. I have a 08 6.7 and I have the MBRP cool dual 4 inch and it was basically 500 bucks for looks. I dont know i there was any performance gain or not.
Is sound a gain that you are looking for? Sound does not make you go faster. Try pulling and grossing 26k up some of the hills on the BlueRidge. You will feel and see performance gains. Lower EGTs and a better breathing powerhouse.