2 high flows vs. only stock Midpipe cat

Don't ask why, just tell me which one you think would be less restrictive.

Thanks.

 

one high flow cat.

I get a little exhaust smell when the motor (and cat) are cold but afterwards its nice. I even passed emissions last week.

But, to answer your question, one stock cat is more likely to flow better than 2 high-flow cats. Look into the Randomtech high-flow cats, as they are supposed to flow very well due to their unique design.

 

sorry, but i must ask.... why?

 

I know emmisions here don't apply to me (I'm registered in FL), but hypothetically I'd like to be able to pass emmisions without so much as a sweat. Basically for my own sense of security.

 

you know that Uppipe also has cat, right?? that makes 3 cats for wrx (02-05)

 

dont worry about em. they don't do sniffers here. Go with one high flow cat or no cats

 

Well heck a catless UP goes without saying... ssh:

 

maybe do a shorty DP like the kind Stromung makes, any catless UP, and then keep the stock midpipe cat. It's far enough away that it wont be quite the bottle neck as the downpipe cat or uppipe cat.

 

^^^^^^^im with stupid ^^^^^^^^^