Just had the stage 4 kit installed on my 14 Electra-glide. I'm gonna have it dyno tuned in 8 days after I add the Vance & Hines Power Duals to my current setup: stage 1 air, Rinehart slip ons and the aforementioned stage 4. My concern is whether I should wait til night before I take it in or go ahead and install the headers now and not worry about putting another few hundred miles on it before dyno tune??

 

It won't matter. The map sucks with any exhaust, LOL. You'll be much happier after a good dyno tune.