It's a combination cause I take a 45 minute commute everyday to school and it's like half highway half city...
My driving is pretty much city only, and I'm getting like 10mpg. I have true duals with no mufflers, does not having a muffler ruin gas mileage?
I wouldn't think so, for one it lets more air flow out of the truck and you would lose the wieght of the muffler so your truck is lighter
Bigun what is the measurments for where to put the 4X4 decals on the bed? I am going to put mine on finally and would like them to be right the first time.