Recently installed 1 7/8" ARH headers on my 11'. Totally a pain in the ass to do but worth it, I can definitely feel a stronger pull in the low/midrange area, makes it nice not having to down shift to pass slow people on the highway. Anyways, was messing around with mounting locations with my gopro today and figured i'd share the video for anyone wondering what the car sounds like with headers and stock exhaust. So far other mods are VMP pulley & tune, JLT c/f intake & c&r/shelby heat exchanger. My ultimate goal is to get a TVS blower, just getting all the supporting mods out of the way. Here's the video, excuse the not so great sound quality provided by the gopro..
https://www.youtube.com/watch?v=XgFHVNe8O7s
https://www.youtube.com/watch?v=XgFHVNe8O7s