Like the HKS Hiper Dual Exhaust?
 

http://us.st11.yimg.com/us.st.yimg.c...1929_318226131

Could our RX8 somehow have this exhaust setup, maybe cutting the rear bumper a little? Or is something blocking it?

u really need to take a look under the car...you will find your answer quite fast. HKS already came out with a single outlet hi power exhaust..check mine out

https://i30.photobucket.com/albums/c...X/hipower2.jpg
https://i30.photobucket.com/albums/c...X/hipower3.jpg
https://i30.photobucket.com/albums/c...X/hipower4.jpg