OER P15211 Features:

Reproduction Tri-Power throttle body assembly for 1959-66 Pontiac models with a 389 or 421 engine. This throttle body is manufactured out of Die Cast and features the carburetor shaft as well as the butterflies. The front and rear carburetor did not have an idle circuit so GM recommends using a throttle body sealer to aid in the rough idle conditions that may be caused.