PW2013STL
Active member
I seem to have noticed a 2-3 mpg drop and even after almost 750 miles I'm getting backfiring when decelerating. I've been runninging 93 octane since the install. I think there was an increase in torque and it is a little louder but not drastic. Any similar stories?
Just the opposite for me. Looks like a 3-4 mpg increase. No change in drivability and been driving in 100 to 105 temps in the Utah canyons pulling a loaded trailer.