The Port/Flange Holes is the number of bolts
that hold the exhaust manifold to the head and the bolts on the flange
to ehaust pipe.
| HIGH PERFORMANCE PONTIAC EXHAUST MANIFOLDS | ||||||
| D-Port | ||||||
| Year | Application | Part # | Side | Port/Flange | Holes | Miscellaneous |
| 1957 | F.I. | 524883 | R | 6 | 2 | |
| 523539 | L | 6 | 2 | |||
| 1958 | F.I. | 530374 | R | 6 | 2 | |
| 528598 | L | 6 | 2 | |||
| 1958 | T395A | 530961 (2) | R | 6 | 2 | cast iron headers |
| 530965 | L | 6 | 2 | |||
| 1959-60 | 420A-425A | 532021 | R | 6 | 2 | |
| 532216 | L | 6 | 2 | |||
| 1960 | 389 SD | 535504 | R | 6 | 2 | cast iron headers |
| 535505 | L | 6 | 2 | |||
| 1961-62 | 425A | 537454 | R | 6 | 2 | R-req. 537242 elbow |
| 537455 | L | 6 | 2 | |||
| 1961-62 | 389 SD | Cast iron 4 into 2 | ||||
| 421 SD | 540297 | R | 6 | 4+2+2 | 61 SD-no collectors | |
| 540298 | L | 6 | 4+2+2 | 62 389-421 SD uses iron | ||
| 543496 (R) 543497 (L) | ||||||
| collectors with 540306 and | ||||||
| 544127 heads. | ||||||
| 1962 | 421 SD | 543053 | R | 6 | 4+2+2 | 62 421 SD aluminum 4 |
| 543054 | L | 6 | 4+2+2 | into 2. Uses same iron | ||
| collectors as 62 iron | ||||||
| manifolds. | ||||||
| 1963 | 421 SD | 9772001 | R | 6 | 4+2+2 | 63 421 SD cast iron 4 |
| (Cat.) | 9772002 | L | 6 | 4+2+2 | into 2 for 9771980 heads. | |
| Same cast iron collectors as | ||||||
| 62 iron. | ||||||
| 1963 | 421 SD | 9772521 | R | 6 | 4+2+2 | 63 421 SD aluminum 4 |
| (Cat.) | 9772522 | L | 6 | 4+2+2 | into 2 for 9771980 heads. | |
| Uses aluminum collectors | ||||||
| 9772354 (R) 9772355 (L). | ||||||
| 1963 | 421 SD | 9772147 | R | 6 | 4+2+2 | 1963 421 SD stamped |
| (NASCAR) | 9772148 | L | 6 | 4+2+2 | Stainless steel headers. | |
| Uses aluminum collectors | ||||||
| 9772218 (R19772219 (L). | ||||||
| 1963 | 421 SD | 6 | 3 | Steel Tri-y headers. | ||
| (Tempest) | 6 | 3 | Single 3 bolt outlet to side | |||
| exit collectors. Collectors | ||||||
| joined by balance pipe with | ||||||
| single outlet to muffler. | ||||||
| 1963-64 | 421 H.O. | 545106 | R | 6 | 2 | R-requires elbow |
| 537455 | L | 6 | 2 | 537242. | ||
| 1965-67 | 421/428 H.O. | 9779493 | R | 6 | 2 | R-requires 9779559 |
| 9779495 | L | 6 | 2 | oil filter adapter. | ||
| 1967 | FB 400 RA | 9779493 | A | 6 | 2 | R-requires 9794111 |
| 9779495 | L | 6 | 2 | oil filter adapter. | ||
| 1967 | GTO 400 RA | 9777641 | R | 5 | 3 | Fits all 64-67 A-body |
| 9777646 | L | 5 | 2 | and most 68-76 A & 70-79 | ||
| F. | ||||||
| 1968 | 400 RA FB | 9791607 | R | 6 | 2 | R-requires 9779559 |
| & 428 H.O. | 9779495 | L | 6 | 2 | (428) or 9799411 (FB) oil | |
| filter adapter. | ||||||