He everyone...i have put a deposit for the "Thorley headers"...got it all planned out. The headers can be installed and still use OEM exhaust. The headers will end at the "cat". The cat will be cut to allow the rear header to be welded to the "cat"...simple. I will have a plate welded on the end of the rear header an a plate will be welded to the cat..thus allowing for removal. Headers also have an O2 adaptor.