Emissions time has rolled around for my "illegal" mustang. The previous owner of the car installed a BBK Xpipe NO CATS, and I have a Hpipe w/CATS via my friend. I've looked under the car and as far as I see, a couple bolts at the header, a couple bolts to the exhaust, and those silly o2 sensors are the only thing in the way to making my car "legal" again. But - when talking to my friend who made the same swap, he mentioned having to jack up the transmission to remove the exhaust from the hanger. Is this true, or are the few bolts all I need to worry about.