Not so much in terms of emissions, but reducing the smell and sound. Im making a custom exhaust, and the way it's currently setup would make it more suitable to just use one cat in the i pipe to keep down noise and cut down on the raw eggs smell of an open exhaust. TIA

 

I would be **** performance wise compared becasue it wouldnt be enough flow. Think of it like this. Stick one strw in your mouth and blow, then put two in your mouth and blow. The 2 is gona flow more. Dont use cats to quiet your engine. Use mufflers to quiet your motor.

 

It would also be too far from the engine to be effective. It wont get hot enough.