I have talked about it before but looking for opinions, I made a 5" straight pipe and ran it for a while. I then checked my fuel mileage and was getting about 13 miles a gallon. A whole lot less than the 19-20 I get with the stock exhaust on it. Just wondering if anyone else has had this happen or if maybe I fudged my numbers?

 

no u must have fudged your numbers diesels like to breath

 

I know, but at some point is there just to much?

 

that happens alot when anyone puts on an exhaust system. heavy right foot to hear it.

 

DieselCrawler is right, once I got my straight pipe true duals done I started driving to hear the music

 

mine was the same way got it were i could hear it and liked it.