Review on Dorman 674 283 Exhaust Manifold Kit by Rex Bareham

This is a cheap, low quality casting with high porosity. You will spend a lot of time cleaning the lightning inside and out to avoid flow restrictions, installing the dipstick and properly tightening the exhaust manifold bolts. You'll also need to go to a hardware store to buy fine thread nuts to match the studs that come with them, as the nuts that come with them are coarse threads. Also get proper metal gaskets from FelPro or IH as the gaskets that come with them are junk and will leak instantly. After all that, you twist an upper pipe or a regular exhaust pipe and realize that the exhaust port ball flange is in a completely different place, rendering that part useless. You'll then return them and spend more time blasting, welding, drilling, tapping and grinding your originally encrusted IH headers to get them as usable as they were originally intended to be. About the same time you spent making them usable. While I appreciate companies that make hard-to-find and NLA parts, it's a tremendous waste of time and frustration when they can't take the trouble to make a part properly. We are talking about a simple exhaust manifold casting. I can get over terrible Chinese quality if that's my only option, but if the part is completely different and unusable there's nothing I can do to fix it. Please make the parts fit or don't bother at all.