I think the Corbin rumble seat adds at least 60 HP! I did a bone stock dyno . And will do a final dyno once all bits are added. So far... got the triple k&n's in sissy bar removed. Gipro installed. And started wiring in the PCIII. I ran out of time at the local bike dealership whom is dynoing my bike and also letting me work on my ride in the comforts of heat! Not even a Triumph dealership, but outstanding people! Wish they didn't sell the brand they do! I'd love to compare dyno sheets with ya Hellfire