A few days back I mentioned I was going to match a 06 can with a 07 header on my 07. The ID of the 06 can is too tight at the mid-pipe to fit onto the 07 header. I did put the whole 06 system(oem) on my 07,fit everywhere perfect,I did not get a chance to test. Side notes: The ID of the 07 can is 30mm measured at the outlet The ID of the 06 can is 39mm measured at the outlet.huge difference. I did not measure the headpipe,but the ID 06 is smaller than the 07,but the 06 can outlet is larger. The 07 ID head pipe is larger than the 06,but the can outlet is smaller than the 06. OFFSET.