The kit comes with axleback gaskets. I don't know if the OP had the same issue as me - the holes on the gaskets for the bolts to go thru were way off, so I modified them.Mine came with a pair of axle back gaskets. Do some not?
Here ya go, don't forget about the O2 extenstion too....Yes....and what would that part number of those gaskets be??? I see GM header gaskets all over as they use them on EVERY LS engine. These axle back gaskets are a G8 only item.
I have not had any issues at all. NOTHING rubs, and the mid pipes are pushed up as high as possible, then torqued the nuts down, so nothing is touching the crossbrace. I have had ZERO issues with these things so far. I love them.i had two issues with this system so far, one th passanger header where its a close fit to the frame well mine rubbed so we wheeled off the coner so there would be no contact. and two the mid pipes seem to hit the crossbrace on big bupms even tho we tighten the bolts as much as we could. is yours doing the same??