2001 TC 88 stroked to a 107, Tman 590, 120 HP with 20 year old VH longshots. I've had the DD Fat Cat w/ perforated baffle on my shelf for 2 years because I couldn't bring myself to get rid of my longshots and I am a 2 -1 vocal hater. But Tman said they would help the performance. So I bit the bullet this weekend and swapped them. Not sure about the performance yet but I am in love with the sound. I thought I would absolutely hate it. But I am in love. Sound is super deep and very performance oriented, especially on the highway. I also thought I would hate the look but I really like it even though my bike is more old school. The build quality is very high as well. My long shots were like a small block engine with blown out cherry bombs. The DD is like a big block performance motor with a Borla system. I can't recommend it enough. But the perforated baffle puts out a lot of sound. If you want a quite pipe, this ain't it but it's not ridiculous. The louvered baffle may be quieter, not sure. Little O