I recently put a new pair of Vance & Hines slip-on exhaust to my Road Glide and was a little disappointed in the the sound of the pipes. I definitely got a few more horsepower with the new air cleaner kit and remapping of the fuel system but was really hoping for a deeper rumble. Can the baffles on the V&H pipes be modified in any way? The pipes are Twin Slash Ovals for Harley touring bikes. I don't want to screw anything up as far as engine performance but just want more sound. Any advice greatly appreciated.:eam