I have just got my AU3 XR8 upgraded to a 3" system. BLOODY BRILLIANT!! :s2: :s2: :s2:
Brilliant sound. Just what I wanted. The engineer found that it "boomed" too much with the normal small resonator he uses on 5.7l engines, so he fitted a Kobi resonator and all is sweet.
Here is the Dyno graph of the results.
Here are the shots of the exhaust.