These are brand new items being offered by Shoebox Ford. Made in the USA and have a heavier wall thickness than the original manifolds. These solve the problem that people run into trying to install headers. No grinding of the manifold or steering box. Comes with a block off plate for the passenger side manifold. Cost is $225 Call 800-732-6029 to order. We also offer a Right hand dual exhaust manifold as well for the same price.