Good Product, Bad Bolts
I got these for my 2005 f150 that previously had leeks in both manifolds. I've only had them a few weeks but so far so good. They sound good, I feel a slight increase in power, and I do notice a slight improvement in fuel economy. The only issue I ran into was with the bolts on the install. A few bolts that came with the headers actually snapped on install so I replaced all the bolts just incase.