I looked into this for My Disco 2 V8 for a trip to morocco we did in March and Land Rover wanted 300 notes for it, as i would need to replace it on my return to get the car MOT'd i decided to speak with an exhaust fabricators who cut out my cats and welded in a couple of sections of Pipe. On our return from Morocco the procedure was reversed and the Cats put back. And all for a lot less than Land Rover cost!!!!!!!!!!!!!!!!!!!