Is easily detroit tru trac, weather is terrible today if it wasn't for the upgrade i would have had to sit at home. I also changed gears from 3.73 to 4.10 liked that mod but might have chosen 4.56 if i had to go back. not much change in mpg maybe slightly better in town little less on open road. It tows boat a little better. I also have the superchip, by far tru trac has served me well. I am wanting to change mufflers next I don't want it much louder in cab but would like a little more rumble, looks like from reading i need to change the y pipe while i am at it. what do you recommend ? Also my gears make a slight wind at 50 to 55 seems to be proble with motvie gears . People seem split on whether its the gears or the installer, noise hasn't gotten any worse or quiter about 5,000 miles on set up. i would have chosen a different brand of gear as well.

 

i love my motives i went with a 4.56:1, i have no problems with mine, every once in a while if its quiet ill hear a small roar slowing down, but usually i dont hear it with my exhaust and stereo. when i redo my exhaust i was gonna go loud and obnoxious but i think ill swing the magnaflow way at this point not sure still on that yet but it gives a nice rumble and quiet in the cab, reason for replacing y-pipe is the restriction of the oem...