http://www.youtube.com/watch?v=moqvle5lGkA In this vid it sounds overly loud as my car is fully stripped out bar two seats and the dash, and the camera is mounted in the boot footwell right over the exhaust, but as you can hear in the first video VTEC is about as noisy.
is yours a cat back or just back box as the flanges are different on buddy club exhausts, on the spec 2,3 they are puxh fit with springs and on the pro its a flat gasket flange your going to have to swap a whole system over