Hi, Bill here. When i bought my tsx the bike had after market mufflers.These mufflers kept the bike from performing to it´s full potential and i was very dismayed.While doing a restoration on a 1968 t120 I installed that (t120) exhaust system on my tsx. WOW, what a difference. I later got new pipes with a crossover and used t120 mufflers. Fits right on, drill one hole to mount the muffler and use the L shaped t120 brackets for the exhaust pipes.a different beast.