Replacement Cats?

Hey Guys,

In April, I'll be bringing the Mustang out from Winter storage. I'll need an emissions test in order to get a new validation sticker. I currently have a MAC catalytic Prochamber mid-pipe on my car. My car is lowered with H&R SS springs which causes the mid-pipe to hang low, consequently coming in contact with the ground every so often. Because of this, my catalytic converters are damaged. Last year, I barely passed the "e-test".

This year, I will need to replace the cats. I don't want to replace the whole mid-pipe. What are my options in terms of replacement catalytic converters? My local shop is pushing the Walker brand cats. What other brands are out there that you could recommend?

I believe the MAC pipe I have uses Magnaflow cats, which have always done the job in past years. I could probably replace these cats with the same parts, but again, I am debating my options.

Also, the emission laws here are tight (similar to California) so I'll need something efficient.

Thanks!

^^ I wish! Emission testing is super strict in Ontario ( ) and no shop is willing to 'pass' you.

I think maybe I'll opt for the SLP's, but I don't know if they will filter as well as I need them to.

I think the internals are damaged as the cat shells have gotten pretty crushed over the years from numerous bang-ups.

I'm wondering how much of a difference in exhaust emission reduction there will be between the installation of two high-flow cats and two 'regular flow' cats.

Thanks everyone, I appreciate your input.

I'm probably going to stick with Walker cats or some other 'mid'-flow cats. I need something that I am not going to change out every two years, it's a hassle and gets expensive fast ... especially since I could spend that money on mods.