On my car which would flow better in theory? :

1. Stock cat converter to cut out

2. Off road pipe (cut out closed) into flowmaster 80 series.

I would think the orp back to the flowmaster but I am curious what everyone thinks.

P.S. I know that it would flow best with orp and cut out open. This is just hypothetical.

 

why would you put your cut out after your cat?

 

Actually, its stock cat to cutout. I'm pretty sure atleast....

 

Typically on these cars the cut-outs go after the cat.

I bet the factory cat with the cut-out would flow better than through aORP to a flowmaster muffler.

I have heard bad things about how flowmasters flow.

 

ttt

 

I second that, the stock cat really isn't that restrictive. Either way you go, I think you'd be in a 5 hp range.