Pontiac Exhaust manifolds have the following casting codes. Note that these are the high performance manifolds only.

61-64exhaust-manifolds01

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