Good afternoon,

I've gone through this, in theory, before, but not in practice, and before I mount parts, thought I check with collective brains on the board.

In the past, with my 93's, when I've replaced downpipe and catalytic convertor, I've always used the spin flanges on both with the metal donut making the seal. I've just ordered and received a new downpipe and the parts guy (I'll not mention any names)convinced me to use the magnaflow cat which has a triangular shaped flat flange (their writeup indicates it fits 90-93, too). Although the holes line up on the flat flange of the cat and the spin flange of the downpipe, it just seems a little odd as I am accustomed to both spin flanges and the trumpet style pipe ends.

There was a substantial savings with the magnaflow cat (which is why I was so easily convinced) vs the EGR cat that has the spin flange (no my car doesn't have EGR) but that was the only cat they sold with the spin flange and trumpet pipe end.

Anyway, does anyone have a handle on this. Will these two mate up OK, w/o leaks of course,

Marty Wolfson

Proud member of the 300K club