I would suggest, do your home work. Many good combo's to choose from. My streetglide is an 08, 96". I chose the V&H propipe and the K&N air kit. Very happy. True duels or a 2-1? Performance, sound and looks. How you put those in order will influence your choice. Enjoy your bike...
All the pipes mentioned are boutique junk !:dh:
What Might be the best for one might not be the best for others.
@gree: I have had BOTH,RB Prostock was cool,VERY LOUD,the heat shields were kinda cheesy....The D&D Fatcat was my favorite choice for a 2-1 on my Fatboy.D&D FatCat seems to perform well for me. I have never heard of the RB racing exhaust. Sounds interesting. But boutique junk? D&D makes some nice exhaust systems if you ask me.