When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Rush slip-ons - 2" or smaller baffles can be used without any other modifications. They do not require remapping the EFI either. Check with your stealer, indy shop, or their website: http://www.epiflex.com/
I believe you can use any type of slip on you want as long as that is all you do. I took the baffles out of set of 07 stock flhx mufflers and have no problems.
I did the V&H basic slip ons without any mods. The bike ran fine, no issues. It is an 06 Road King so it should be the same on yours. I even did some mods on the baffles without issue.