Used notched air valve flap used on some Pontiac and other models. Air valve flap mounts in the airhorn. Two air valve flaps (L&R) are used in the quadrajet airhorn.
Rochester products OEM part # 33631
This air valve flap installs on the Drivers side of the carburetor.
#4212C Air valve screws
This is a used part that has been re-plated.
Quantities are limited.
"Partner" air valve flap is Q-AVF-33630