i just installed a set of rush slip ons on my dads 09 heritage. he also has a drop in k-n-n filter with a swiss cheesed air box. the bike is going to the dealership tommorrow to get a sert and a few dyno runs. can anyone tell me what kinda numbers to expect?

 

Here is a thread devoted to this topic.

https://www.hdforums.com/forum/softa...ftails-26.html

 

Mine went from 63.99 hp to 75.41 and 78.16 to 87.36 tq. I did rush slip ons and pc lll and big sucker. Stock was done at 91 degrees and the dyno was done at 68.