FWIW I was messing around with my exhausts today and found that my 2006 Leo Vince X3 silencer slips on the '08 stock header like a glove. The 08 stock header sticks out to the side more than the '06 stock header and WAY more than my Leo Vince header. As an offroader that is not good, I'll be using my old Leo Vince system. By holding them in my hands I swear the '08 silencer is heavier than the '06 silencer. Have not weighed them though.