Unless someone had miraculously got one sitting on shelf somewhere collecting dust

Stranger things have happened - some friends of mine have a 1920's Morris Bullnose and they were looking to have some rear wheel bearings manufactured. As luck would have it some ancient original Morris items were found in an old dealership - they bought up all the stock of relevant parts!

I once noticed that the rear silencer on my crusty old Hilux was at a strange angle. I grabbed it to see what was up and the whole thing came away in my hand. It turned out the loud clang I'd heard a couple of weeks before was the entire centre section falling off.

Anyway, a Powerflow stainless exhaust wasn't much more than buying a standard mild steel one. I never had any issues with it, although it wasn't the most elegant piece of fabrication.

A 1986 car on here. Cheered me up a bit. Thanks.

If you get a stainless steel (presumably full) system done, that'd perhaps be an additional reason to rust treat the car, if you dont/havn't already.

If you just replace the middle section in mild steel, it MIGHT be worth treating the exhaust.

My trick for this was to put some beer can and a teaspoon of Portland cement in the downpipe whenever I had it open, my theory being that the aluminium would flame spray the inside, and the cement would neutralise acids. No objective proof that it worked, of course, but it seemed to make sense. Wouldn't be worth doing on a stainless system, and would be a very bad idea with an exhaust catalyst.

I also wrapped the first maybe third of the system in aluminium pipe cladding (and beercan on the straight section) which might have protected the outside a bit, and also kept the exhaust gases hotter, cutting internal condensation. Thats a bit of a hassle to do, but I had the exhaust off anyway to replace a sheared manifold bolt.