"I just installed my Thunder Monster baffles on my Fat Boy. What a difference! I can feel the power. I mounted the Thunder Monster baffles into the pipe approximately 12" well over the 3" minimum you suggested. I have been an automotive service tech for over 30 years and have raced almost everything with an engine. I never expected this much of a change from an investment under $100."

Mark Briggs, Rockford, IA Harley Davidson