On my 08 FLHX I went with an Andrews 30 tooth tranny gear and went with a 70 tooth rear pulley and used the same belt. Got rid of that factory cush pulley. Pulls like a monster now. Very happy with the results. No more lugging in sixth gear and did away with the constant 6-5th down shift. I also found a bagger brace from Grey Area Technoligies for less than $150.00, and boy did it make the world of difference in the ride. No more rear wheel wobbles in lines or ruts in the road, and corners 100% better.
For a great pulling torque cam from 2200 rpm until you let go...I found the Tman 625's to be monsters...and quiet as stock.
Just my 2 cent...from No Cents.