NOS FORD
SMOG ANTI BACKFIRE VALVE OR GULP VALVE -- L-3555-S.
NOS FORD ORIGINAL VALVE FOR THE Ford, Mustang, Fastback, Coupe, Convertible, GT, GT-A, Shelby GT-350, Hertz, Fairlane, Ranchero, Falcon, Mercury Cougar, XR7, Comet, Cyclone, and Ford truck. ORIGINAL THERMACTOR EMISSIONS SMOG 'ANTI-BACKFIRE' VALVE. FOR 289 352 390 AND 428 Engines.

GULP VALVE HAS A DATE CODE OF 911. IT HAS HOLLEY STAMPED ON THE TOP OF IT, EXCELLENT PIECE FOR ANY CONCOURSE RESTORATION.