This Sil Motor Conical exhaust is a very good candidate for my Monster (800, -04, no cat). It is sold in "race form" with 105 db or/with removable baffles.
Those who have it are you happy with the sound and how is it compared to Termignoni? I'm just wondering do I need to adjust the mixture or buy a power commander so that the machine doesn't run too lean? It might be so if this is this one of those mufflers that you can see right trough if you remove the baffles. So there is not as much back pressure as in the original.