i have been toying with the options of a single pipe setup or a twin pipe set up. I ran a twin on my 04 king cat and loved the extra power and the sound. I have had a few people tell me that a single pipe setup on the 09 can produce the same hp as a twin setup. I find that hard to believe myself but I am interseted to hear of anyone that has used a twin pipe and how it was or is. I am looking at the D&D twin pipes, the cutler adj. weights, some new clutching springs and helix and a boondocker controller.
