The Termi system on the carbon 999 attached, is the Asymmetric system, which has a "similar" bore to the original and replaces the cat in the link pipe and the cat in the silencer box. The Termi 54 & 57mm systems are "big bore 2-1-2 systems" and is a complete replacement system. The right foot peg needs to be spaced out to clear the link pipes. Hence the crazy price @ £1800 + VAT. There are Corsa 60mm systems available to race teams......at crazzzzy money !!, but of course no good for road use ;-). The Sil motor looks good, do they have any Dyno runs/graphs. Not sure where you would hang the lighting bracket/number plate mount, unless you are a track day only ??. Rgds Millie |