Just FYI, the stock 'gasket' for the o2 housing is a crush washer thing, so don't bother ordering it, just take measurements off the o2 housing and possibly get some gaskets made up if you can. Second, if you were to make a T28 o2 housing that would be cool, for people who have T28 downpipes already, and wouldn't have to cut and weld. An entire 3" turbo-back setup would be even better! one that didn't drag on the ground and such, like so many that have been made..