Why It Matters
The standard 421 used Carter AFB 4033S with synchromesh or 4037S with Turbo Hydra-Matic.
Also Known As
Carter 4033SCarter 4037S421 four-barrel
Part profile
1966 Pontiac 421 Carter AFB
carburetor · Pontiac
Used On
2 linked car pages.
Series 25437 hardtop coupe or 25467 convertible
1966 Pontiac Catalina 2+2 421
254 2+2
26657 two-door pillarless hardtop coupe
1966 Pontiac Grand Prix
26657 two-door hardtop coupe