4" exhaust - mileage

[twister11]

I have a 2005 duramax and do a lot of pulling. I have installed the edge juice and am getting 7.5 to 9.0 miles to the gallon pulling. On my 2003 I was always getting 12-13 mpg. Has anyone done exhaust on an 05 and kept track of the milage differences and exhaust temp differences.

[dakotakid]

I just upgraded to quite a bit bigger camper - and it shows in the exhaust temps and fuel mileage. I got my Edge over the winter so didn't pull with it any until the new camper showed up, so don't have anything to compare it to. After one SHORT pull I did order the Kennedy exhaust system, though smile.gif I was upgrading for temps only - didn't know it might help the mileage any...

Pat