THAT'S what I was looking for. But this passage caught my attention:Land Rover Workshop Manuals - Discovery II - Exhaust Emission Control System
"The two catalytic converters are shaped differently to allow sufficient clearance between the body and transmission,
but they remain functionally identical since they have the same volume and use the same active constituents."
Good point, I ordered another 6905 for my truck before the June 1st ban went into effect here in NYS.Go to Summit Racing and look up Catco 6905 catalytic convertors. I've used them many times on various Range Rovers and Discovery's I've had over the years. They're cheap and fit either side. IIRC they offer two different lengths, 12" and 14." I recommend the 12" version for OBDII trucks (more room for the upstream and downstream bungs for the O2's) and the 14" for OBDI trucks.