I had the Rush 2.25 on my 07 RKC , too much popping on decel , went with 2 inch baffles and installed my Thunder Monsters just ahead of the mufflers in the head pipe . I could not be happier , sounds great , nice deep rumble and really barks when you open her up.

 

Installedthe Rush slip-ons about two months ago, I love the sound! I didn't want them too loud so I bought the 1.75 baffles.

 

had the 2.5's and lots of popping. changed to 1.75 and couldn't be happier. quieter on highway but still bark when you crack the throttle...ride safe!!!

 

I'm running them both right now in my 08 Ultra. Thunder Monsters in the true dual head pipes and the Rush slip-on's with 2" baffles. Very deep and low sound!

 

roofer, take them out, you will have to much baffling if you leave both of them in, I know because I just came back from the dyno and it will kill the hp but it will help on tq a little on the bottom end, it will also change the sound of your mufflers.