This thread makes me glad that I chose a Rush 2 into 1 for my Dyna. My pipes should be here on Tuesday and I can't wait.

 

On a stock catted headpipe bike, the 2.5" will be about as loud as a 2" baffle on a non cat header. More mellow/deep then loud.
I run nothing but Rush products on my last 3 Harleys. This has much to do on how they handle their customer's and the way Ryan stays on top of things on this forum and others.
Their quality, fit and performance is another reason.

 

Thanks for considering Rush! If you have aftermarket head pipes, the 2.5" is loud in my opinion. Check out our youtube videos for the Big Louie's. I worked the recording gear while our sales manager did a performance workshop. Every recording has the mic in the same place at the same level. What you hear is the raw recording form a high end recording device just like they use for concerts. If you play the youtube videos in HD though a speaker system you will hear an accurate representation of the change in sound and really hear the bass. Most people with open headers like the 2.00" or 2.25". If you have a catalytic converter, go with the 3.00". The 2.50" is the smallest that should be used with stock headers. I'm here if anyone has questions.
Ryan

The link to youtube is in my signature.

 

....Yep....

2014, completely stock other than the Big Louie w/ 2.5" baffles.... Should have went black I suppose.... The only reason I went chrome was I thought they HAD to be better than the CFR's I ditched on my '13, for the same reason... yeah, well...

 

3" baffles as they recommend may help...

My 2 cents, change the headpipes and get it tuned.