I use abs always and mtc more than 1/2 the time but I always ride in sport and adding a K&N air filter smoothed things out a bit, I have 6600 so 6000 actual miles of mostly backroads and the engine felt like it was starving for air. I was initially nervous about going in there when the box says 1-3 hrs installation but it's pretty easy with the two plastic pieces with 2 screws in each, 2 screws in the tank, 1 electrical clip and swing the tank around and out of the way then 8 screws to take the filter cover off and there she be, the velocity stacks look serious! just remember to drain the gas before moving the tank, my rubber hose had no clamp and slid right off. i'll look at rottweiler after my link pipe arrives.