What CAT?

[IndianaTravis]

My Catalytic converter is going.....what's the most cost effective, legal, replacement?

BTW, the lady at SFX said that they still have a "LOT" of Bosal Exhausts left. Still $165.

[316i compact]

Before buying anything check out Jetex cats.do your search!

[m3outtanowhere]

obd1, any thing you want (remove it and run a straight pipe in you feel like it not legal though). obd2...??? i hate computers in my cars.

[IndianaTravis]

I'm OBDII. I could still run the straight pipe if I can live with a CEL. It isn't legal, though, and is also illegal for autocrossing purposes.

I'd prefer to find a way to economically (cheaper than the $350 I've found on line for a complete bolt-in replacement) replace the CAT.

[316i compact]

You could use a 200 cpsi cat without CEL on for sure. And maybe even 100 cpsi. Does the M44 ti have one or two lamda sensors?

[IndianaTravis]

two. One before and one after the CAT.