My thoughts are on a dual 3" setup, similar to the Kooks, back, over the axle, and stepped up to a 3.5" muffler on each side. I'm thinking Magnaflow. The car will be a street setup, so I want to keep the noise in check, but keep the flow up.

 

you gunna run an x or h pipe? x would be better if you want the flow. What size outlets are on the exhaust housings?

 

For the street, I would suggest a single 4" with cutouts in the 3" DP's before you merge them. You can make a boat load of power thru a single 4" exhaust. LS2Formula went 7.8 @ 179 with twin TC78s thru a 4" exh over the axle.

 

open DPs

 

Im not sure on the outlet. Id like to run an x pipe, but there isn't room with the TQ arm I have, without going custom.
I guess I'm getting old. The car has been loud for 10 years. Im ready to move on to something else.
How restrictive will it be with 2 3.5 mufflers?

 

Got any pics of that setup?