Just got back from driving my '16 GMC 2500 4 door, long box, with a 6.0 gas, on a 2600 mile road trip. I had the boys replace the behemoth stock GM muffler with a straight pipe before leaving. They didn't split the exhaust or mess with the cat. The best that pickup had ever done for gas mileage on a trip previously was 13 mpg. The average for this trip was 14 mpg, with some headwinds, and pushing it to 90 mph at times. It did seem like it would wind up the rpms quicker than it used to, and it did run strong, for what it is. It was kind of loud, but probably less than the dual exhaust and cherry bombs we used to put on years ago. Didn't get ticketed for a noise violation anyway, and that's spending some time in Scottsdale, AZ. :lol2:
File this under "posts that don't really matter"........or "never grow up, never grow old."
File this under "posts that don't really matter"........or "never grow up, never grow old."