These manifolds are cast from high quality molds for proper fit and appearance. Replaces Ford part numbers C8OZ-9430/1-BC. We enthusiastically recommend FE performance minded 390 / 427 Cougar and Mustang owners consider upgrading to these in lieu of headers. These will not only enhance the value of your FE Cougar but will be much easier to install. If you do put these on your 390/427 powered Cougar you will have to have a machine shop drill additional holes in your cylinder heads. These are an exact fit and are actually less prone to cracking than the originals.
Includes spacer, exhaust flange bolts, nuts and washers.