Had some fitment and part quality issues with replacing the old catalytic with one I ordered and received. Quality issues aside, the main confusing part fitment issue is that my intermediary pipe (OEM replacement supposedly, made by Walker ) that follows the old cat has a flat / flush mating method and a thin gasket, where as the cat I received (also OEM replacement supposedly) is expecting to see a concave mating using a donut gasket and spring bolts.
When checking parts diagrams for a 1989, I see the flat mating. When seeing diagrams for 1990-1992, I see the donut flex mating. Ok, fine.
But... the products don’t follow those rules..
My new cat is a BRExhaust, meant for 1989, has a donut downstream end as mentioned. So that’s weird. So I decided to just order the BRExhaust intermediary pipe for 1989 thinking at least if I follow the brand it will connect, and it’s pictured on Autozone websites as having the donut type connection, and sure enough it shows up and it’s FLAT. So the BRExhaust 1989 pipe does not fit with the BRExhaust 1989 cat. Great!
So I’m thinking I should just order a 1990-1992 intermediary pipe, which should be the donut flex type connection, and just use that. But my concern of course is that the muffler and tailpipe will then have to be changed if for some reason everything is different there, and also that my frame hanging points won’t line up for said changes.
Anybody have any knowledge about all the compatibilities here?