Hay, you asked. I think the high dollar ones are boosheet. I wouldn't pay it. As long as you have your junk at stock ride height, you're good with the cheap headers. I've run lots of them. I can have a pair on an a body....well ok, I'm old and wore out now, but when I wasn't I could have a pair on in about two hours. It's just not that hard to do and you'll be hard pressed to see a difference in the butt meter from the thousand buck ones.