High Flow Cats

[Mustang414]

Are high flow cats worth the investment? How does it affect my emission testing? What are some good cats if any?

[lowflyn]

High flow cats will give you better flow and still let you stay under emissions. I'd say go for it if you've done everything else on your car to get decent gains.

[slvr2000stang]

I have heard of a bunch of guys getting the Magnaflow High flow cats