What say you?
Yes some cars gain and some don't. I had ARH headers on a previous Mustang prior to adding a Vortech and my car did not make any more power than other Vortech cars running similar setups but with stock manifolds. Another local guy had a blower and blower cams on his car, then added longtubes, and gained 8rwhp. Multiple other people have had similar results. I'm running 12psi on a 4v 10.1 compression on E85 and have no intention of doing headers even when I up the boost and timing, unless someone gives them to me for free (I got the ARH's for free from winning a raffle). Yes you're gaining a few hp, but you're never going to feel the difference, or sometimes even see the difference, on a car that is already making a butt load of power. Headers are absolutely not needed on anything making under 700/800rwhp that is boosted, unless you have them paired with some nice cams. My cousins 2017 GT made 720rwhp with ease on 9psi Paxton. He's not running out to get headers even when he bumps it to 900 with a little more boost and E85 headers won't be a priority. Money can be spent better elsewhere or put towards a bigger mod fund. If someone is looking at a max effort setup, whether it be na, boost, or nitrous, then definitely throw headers on the list.
