I have the Trust Power Extreme II system, its PURFECT! No drone whatsoever, and when you open it up it has ANGRYGROWL Couldn't ask for a better system.
The PEII is cat-back, but before that I have custom split/stainless dump, RS*R Front Pipe, De-cat pipe then the PEII system - Just FYI
The PEII consists of a center muffler and a rear cannon btw