Slip on muffler baffle recommendations for stock bikes(retaining the stock head pipe)
These recommendations are based on a combination of sound and performance.

Touring
Standard Slip-on and Big Louie
10-12 2.50"
95-09 2.00"
95-12 True Duals and slip on with 2.00" baffle

Dyna (including Fatbob and Wide Glide)
95-12 2.00" - 2.25"

Sportster
92-12 2.00"

Softail
00-12 2.00"
Check with your local shop or contact Rush tech support by phone or email for tuning guidelines.
tech@rushracingproducts.com
(866) 994-RUSH

 

My dealer actually recommended the rush slip ons with the 2.25 baffles. I was never expecting it to sound like full headers. I was very happy the first time I started it after the install.