anybody have this type of setup for a N/A?

Stock manifold --> RacingBeat downpipe --> Catco high flow cat OR Bonez high cat --> RacingBeat catback system.

Would this be a good setup for the street on a RX-7 with little to no mods?

Also you anybody know (or guess) if it would be very loud?

 

does the RB downpipe fit onto a NA manifold i thought it only fit onto the turbo manifold (correct me if im wrong)

 

RB does make one for N/A for 90 bucks. That's excluding the presilencer. p/n: S16206

 

That would work. But its still going to have two main restriction points: the cat and the stock manifold(tub).

I guess your going that route because of emmissions. But if you don't have emissions then just get headers and a pre-cilencer.

 

Yep. Needs to pass emissions.

 

^^

 

racing beat is never going to be insanely loud like CS or APEXi mufflers. You will still have the stock mani right? that will keep things even quieter.