I will find out for sure in a couple weeks. I have the 4"RH's and already and ordered the S/C/S drago head pipes. My understanding is there will be no issue with the fit.
There shouldn't be so long as you got the RH slip-ons and not the replacement mufflers for their TD system which have a larger inlet diameter.
Standard slip-on inlet diameter (where it meets the header) is 1.75", the Rinehart mufflers for their full systems are 2", so when buying Rinehart mufflers you need to triple check for the correct part number and make sure you're getting the 1.75" setup.
2013 RGU Ember Red Sunglo (Under Construction)
Last edited by Fire-Medic; 11-27-2012 at 10:20 PM.