Abbynormal

Wow ! I just removed my temporary glasspak that came with my 4" exhaust system and replaced with the resonated AeroTurbine 4040L. I likes it ! It sounds a LOT better than stock or the glasspak. I even had pipe going halfway through my glasspak cause I knew I was going to need more pipe for the shorter Aeroturbine. Under acceleration it has a deep growl but not loud. There is no drone in the cab at 70mph and there is definetly a seat of the pants improvement in accleration......plus it makes a real cool sound when you shut the engine off. you can hear the turbo going WOOOSSSsssssshhhhh for a long time after shutting off

kandgo

I had a 3" one on for a few miles before I went with 4" and I liked it. It worked just as they said it would, as in lowering temps and such. If the stainless 4" muff I have on now ever goes south I would try a 4" for sure. Goodluck,,Rick