Before the shops close here at 6!! I have an 08 yz450f. UPS just delivered my akrapovic slip on, but I think it is for an 06-07 because the slip on diamete is BIGGER than the diameter of the header. Now, If I get an 06-07 header from a shop, it should bolt up to my 08 right??? please someone say yes...BTW, the header the shop has is a powerbomb. anyone run the FMF bomb with a different brand slip? NEED HELP BEFORE 6!!!