Originally Posted by
Rogeyboy
Rob, i noticed that when fitting mine... My NA system had the same size box internally, maybe its to keep noise down or back pressure up?
Eventually i'd like a scorpion 3" system as ive got a 2.5" atm, hoping the 3" has larger internal back box!
As far as i am aware scorpion nor magnex made a 3 inch bore system only mongoose, the scorpion is restrictive as the internal diameter of the silencer is no bigger than the standard rs turbo exhaust from out the factory!!! So mongoose is the way forward or have one made up by the likes of hayward & scott etc