Basically mines runs a decat pipe. (Note, u can run a highflow cat) From there it runs a twin system 2 x 2.25" back to the rear which has 2 x 3" cannons. Thats it, no centre pipes, mufflers, hotdogs at all. Nothing bar the rear 2 mufflers.
Is it loud? No. Does it drone? None. Does it flow well? Its the equivalent area of having a single 3.75" pipe under the car.
Twins cut down the sound, help ground clearance and have great flow. Mild steel over stainless anyday to reduce drone in car. Have a look at the Ford exhausts -twin systems. Why? 4Lt of turbo gas to pass out the rear...
Dont believe me, or Cubes call us liars
PS - My exhaust is actually made for a r33, but i modded it to fit my r32. If i had cash to buy one off the shelf, my recommendation would be for the Apexi N1 dual pipe kit. Bolt on
http://www.apexi-usa.com/product_exhaust_d...0&pageNum=1