Hello touring, my first post after buying a 2015 Road Glide. Absolutely love it. I already installed an Arlen Ness Slot Track Big Sucker air cleaner and it really came alive. The exhaust is next to get rid of the cat. I am torn between the Rush 7017 ceramic head true duel or the Rush Rec17 that uses the OEM heat shields and costs about half. It does not use the ceramic and is 18 gauge instead of the 7017 16 gauge. I would appreciate any input. Is it really worth another 400 bucks and does the ceramic really run that much cooler?