Exhaust Manifold Codes
Pontiac Exhaust manifolds have the following casting codes. Note that these are the high performance manifolds only.
| Casting | Date | CID | Side | Port | Notes |
| 523539 | 1957 | 347 | LH | D | FI |
| 524883 | 1957 | 347 | RH | D | FI |
| 528598 | 1958 | 370 | LH | D | FI |
| 530374 | 1958 | 370 | RH | D | FI |
| 530961 | 1958 | 389 | RH | D | T395A |
| 530965 | 1958 | 389 | LH | D | T395A |
| 532021 | 1959-60 | 389 | RH | D | 420A, 425A |
| 532216 | 1959-60 | 389 | LH | D | 420A, 425A |
| 535504 | 1960 | 389 | RH | D | SD |
| 535505 | 1960 | 389 | LH | D | SD |
| 537454 | 1961-62 | 389 | RH | D | 425A |
| 537455 | 1961-62 | 389 | LH | D | 425A |
| 540297 | 1961-62 | 389 | RH | D | SD |
| 540297 | 1961-62 | 421 | RH | D | SD |
| 540298 | 1961-62 | 389 | LH | D | SD |
| 540298 | 1961-62 | 421 | LH | D | SD |
| 543053 | 1962 | 421 | RH | D | Aluminum SD |
| 543054 | 1962 | 421 | LH | D | Aluminum SD |
| 9772001 | 1963 | 421 | RH | D | SD |
| 9772002 | 1963 | 421 | LH | D | SD |
| 9772147 | 1963 | 421 | RH | D | NASCAR steel SD |
| 9772148 | 1963 | 421 | LH | D | NASCAR steel SD |
| 9772292 | 1963 | 421 | LH | D | SD |
| 9772521 | 1963 | 421 | RH | D | Aluminum SD |
| 9772522 | 1963 | 421 | LH | D | Aluminum SD |
| 537455 | 1963-64 | 421 | LH | D | HO |
| 545106 | 1963-64 | 421 | RH | D | HO |
| 9779493 | 1965-67 | 421 | RH | D | HO |
| 9779493 | 1965-67 | 428 | RH | D | HO |
| 9779495 | 1965-67 | 421 | LH | D | HO |
| 9779495 | 1965-67 | 428 | LH | D | HO |
| 9777641 | 1967 | 400 | RH | D | GTO HO |
| 9777646 | 1967 | 400 | LH | D | GTO HO |
| 9779493 | 1967 | 400 | RH | D | Firebird RA |
| 9779495 | 1967 | 400 | LH | D | Firebird RA |
| 9777641 | 1968 | 400 | RH | D | GTO RA |
| 9779495 | 1968 | 400 | LH | D | GTO HO |
| 9779495 | 1968 | 400 | LH | D | Firebird RA |
| 9791607 | 1968 | 400 | RH | D | GTO HO |
| 9791607 | 1968 | 400 | RH | D | Firebird RA |
| 9791607 | 1968 | 400 | LH | D | GTO RA |
| 9791637 | 1968 | 400 | LH | D | GTO RA3 |
| 9794033 | 1968 | 400 | RH | R | GTO RA2 |
| 9794035 | 1968 | 400 | LH | R | GTO RA2 |
| 9794036 | 1968 | 400 | RH | R | Firebird RA2 |
| 9794038 | 1968 | 400 | LH | R | Firebird RA2 |
| 9797072 | 1968 | 400 | RH | D | GTO RA3 |
| 9794035 | 1969 | 400 | LH | R | GTO RA4 |
| 9797038 | 1969 | 400 | LH | R | Firebird RA4 |
| 9797073 | 1969 | 400 | RH | D | GTO HO |
| 9797073 | 1969 | 400 | RH | D | Firebird RA3 |
| 9797074 | 1969 | 400 | RH | R | Firebird RA4 |
| 9797075 | 1969 | 400 | RH | R | GTO RA4 |
| 9799495 | 1969 | 400 | LH | D | GTO HO |
| 9799495 | 1969 | 400 | LH | D | Firebird RA3 |
| 478140 | 1970 | 400 | LH | D | GTO RA3 |
| 478140 | 1970 | 400 | LH | D | Firebird RA3 |
| 478141 | 1970 | 400 | LH | R | GTO RA4 |
| 478141 | 1970 | 400 | LH | R | Firebird RA4 |
| 9799720 | 1970 | 400 | RH | D | GTO RA3 |
| 9799720 | 1970 | 400 | RH | D | Firebird RA3 |
| 9799721 | 1970 | 400 | RH | R | GTO RA4 |
| 9799721 | 1970 | 400 | RH | R | Firebird RA4 |
| 478141 | 1971-72 | 455 | LH | R | GTO HO |
| 478141 | 1971-72 | 455 | LH | R | Firebird HO |
| 9799721 | 1971-72 | 455 | RH | R | GTO HO |
| 9799721 | 1971-72 | 455 | RH | R | Firebird HO |
| 490802 | 1973-74 | 455 | RH | R | Firebird SD |
| 490803 | 1973-74 | 455 | LH | R | Firebird SD |
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Most recent revision Thursday, January 6th, 2005