oh my goodness. Theres gotta be a thread on either ws or evo every single day. You should use the search feature on the top right corner of the screen. There has been literally about a million topics on the WS exhaust. Yes, its quiet. For some ppl, its a bit too quiet. Tip is 3 inches. They have the piping diameter and tip size in every vendor site that carries the ws. Piping diameter is 60 mm. It looks subtle and sound is really quiet. Next time, use the search feature on these repeated topics. Hope that helped.