i finally got the powerbomb hooked up to the yosh. i bought the slip-on before i came to this site and now i really regret not buying the full system, so i thought my best option would be to get a aftermarket header. i went with the FMF powerbomb. i have a motarted 2000 S. the header is bigger in diameter than the stock S header and was to long to fit right up with the yosh. so first i had to cut the pipe down an inch then i had to take the sleeve out of the yosh to get the new header to fit. when i took the sleeve out now the yosh was to big. i got some steel tubeing and made my own sleeve. now it fits. such an ordeal. i know, i should of got the full system i just took it out for a ride but the ground was wet, a lot of wasted HP. i'll post some pic's and a review tomorrow.