So... wouldn't the 08-12 header not fit on the 07 since Danno pointed out that the diameter is bigger?-Nightmare
The '08 header will fit the '07 engine and chassis, but the outlets and collector are bigger because of the 3rd cat. The '07 midpipe will not slip on over the '08 outlet.
Putting '08 slip-ons on an '07 header (original question) will require sleeving down the midpipe or sleeving up the outlets since there is a 2 mm difference.
The slip-ons I have fit with no graphite gasket, so if they are like that, adding the gasket may make up the difference.
* Last updated by: Danno on 3/3/2014 @ 5:20 AM *
'07 CPB Blue; ZGST windscreen with MRA X-screen adjustable spoiler, tube bar adaptor, PC III, ATRE,BMC air filter, modified stock seat with 2nd Look cover,Scorpion Flame Ti slip-ons, Galfer rotors front and rear, braided-stainless lines, C-F 10R front fender, C-F hugger, C-F inner fairing panels, painted foreman's fins with faux C-F inlay, polished rim lips wired for heated gear and accessories, Givi V35 side bags and E41 topcase with SW-Motech qd mounts