Hi, I'm looking to change my stock exhaust on my '08 WR 450 (ist too restricted!). I've heard that installing the stock exhaust of the yz450f would be a good option. Does anybody know if the stock '08 yz450f's exhaust system fit the '08 wr450f? Would you recommend it for enduro racing? I know the'07 fits, but I've heard some good things about the '08. Thanks!