Currently have Rinehart slipons on my 08 Ultra. I'm tossing around the idea of true duals. Can yall tell me what pipes/head pipes out there will work with the slipons I currently have.

 

For sure the Fullsac setup will work. I bought mine off Ebay for $139 plus $18 shipping, then purchased the 24" chrome heat shield from Harley Goodies for $57 shipped...
Checkout www.fullsac.com. I am sending you a PM with a link.

 

I am in the same boat. I also have the Rinehart slip ons. I am thinking of going with V&H dresser duals for my glide

 

I'm going with V & H power duals into Rinehart 4" mufflers. Power Duals will fit your mufflers.