5.0 Exhaust questions Reply #15 – August 26, 2014, 06:10:50 PM The h-pipe he has is fine. You have 4-wire oxygen sensors, too, and any Mustang or Mark VII with a 5.0 HO can donate you it's headers. That's 87-93. If it looks clean offer him $50 for it. Stock headers will still fit that h-pipe, just not cast iron manifolds like you have now. I have the same h-pipe you linked to, and I had it d up to stock HO headers for a little while before I bought my BBK's. You're worrying too much, relax. Quote Selected