Well I have been building bikes almost 30 years so I have gutted almost every pipe there is to go on a brit plus some jap and Hardley stuff too. Cut SM pipes gutted except for the reducer are so far best dyno run I have had at almost 65hp with freak , no AI ,155 main and 48 pilot. Sceptre (on different bike so take that into consideration) long set not the short set came in at 61 hp. same set up just different bike. Sceptre was on 03 America rest were on my 04 SM.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!