Boysie, the silencer is the low carbon Mistral, db killer and cat intact. It has not been remapped and aside from some snatchy behavior off idle it runs pretty smooth and very strong. Strong enough to keep up with my buddy's 2014 Aprilla Tuono through the many canyons of Arizona. It sounds glorious at full song but mellower/milder than my 900SS with the Borla exhaust setup. The pipe is a beautiful piece of workmanship and the quality is evident.