Original pair of 66 Fairlane 390Gt exhaust manifolds with heat riser. Heat flapper riser functions fine.  No cracks I can see. May also fit Mercury, Mustang Cougar, etc and other years such as 1967, 1968, but they are dated January of 1966 so came of a 66 Fairlane , Comet etc. Will fit any Ford FE with 14 bolt heads.  C6OE engineering numbers