Depends....Cat or Cumin's. I have a 430hp Cat in My Renegade Columbia cab 10speed auto shift , Also have a F650 26,000 GVW with a Cumin's. The Cat is smoother and quieter even though its a bigger motor but gets 6 mpg the Cumin's around 10mpg. We had a 340 hp cat in our FL 70 was kinda hard on flashers but ran great on the flats the cab is a little small the Columbia is WAY nicer ride and room .