Matt at M&M Choppers hooked me up with an enhanced motorcycle engine. He sent my HD Crossbones heads and cyclinders to Dave Mackie for oversized valves, cyclinders, pistons, and porting/polishing of the heads for an 103 cubic inch engine upgrade. There's a noticeable difference in torque and horsepower that not only increased the performance of my ride but also sounds pretty nasty (and that's a good thing!) I couldn't be happier, M&M.
