I finally ordered RCX tormentor headers and fuelpak 3 last week. I read some negative reviews on each but talked to RC last week. Great people to talk to and told me they have sold a bunch of m8 pipes with very little trouble and they would not be a problem. My dealer said I could go with SEPST or fuelpak. Dealer said if I was just doing stage 1 the fuelpak is great and super easy to use. Bought it all at the dealer. I did the install today. Couldn't have went any better. Just got back from a little ride and love it. No more 500 degree leg burn, I lost a little bottom with just the rcx 4.5 when I bought the bike. With the tune and the intake and pipes its all back and more. I know there maybe more advanced tuners out there but so far very pleased. Mostly wanted rid of the heat. Sound now comes out both sides. lol. PS about a 1/8 clearance where I have seen post of pipe hitting tranny bolt.