well i had the first hyper charger kurayaken came out with and i just recently up graded to the new pro R. it out performs the S&S and the arlen ness sucker. if you have it on the dyno you dont get a true measure unless you put a big fan infront of it to simulate going down the rd and you can watch the horse power go up.

 

I have read alot of these threads on other fourms and ole mike rolad himself even admits their for looks except the new pro r or one of those models lots of info go to harley tech talk on msn go back a few days and you'll see the topic where mike roland chimes in pretty good

 

Good to hear this. The one I bought was the new Pro R model. Like I said, I could notice a difference. Now if the damn thing didn't stick out so far.....