Bison Asko

I have done alot of searching and I have no idea what type of CAT i sould buy. I have a 86 s4 it is my daily driver and i just wanted to keep it emissions legal. right now i have 1200miles on the rebuilt engine and it gets good gas mileage. I have been looking at products from rotaty performance and Mazdatrix. I was just wondering what kind or type of Cat would get rid of the common rich smell and wont rob me of a ton of power

ROTARYROCKET7

Get a hi-flo catback. Check out www.mazdatrix.com (the racing section). I beleive RX7.com has the bones hi-flo cat

Jason NYC

Bison Asko

Thanks man I was actually thinking about buying the RB Header and the Converter that comes with it. I was wanting to know would a medal core converter last longer on the 13b. I heard that they are louder but if they last forever i can get a sliencer to handle the sound.

Sideways7

iTrader: (7)

Aren't they already metal core or somthing just to survive at all?
So which cat are you getting, the Bonez one? Those are generall good cats from what I've heard.

Black91n/a

I don't think the Bonez are metal substrate, but no matter what cat you get it will die eventually.

Sgt. Pepper

I bought a used Bonez hi-flow cat *used only to pass smog twice by previous owner* to go with my Racing Beat header. I passed California emissions with that setup. The guy was cool and didn't care about visual, as long as you had a cat fed by an air pump and passed the sniffer you are good to go. I passed no problem though.