Wallace Racing

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Pontiac High Performance Exhaust Manifolds

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.

	HIGH PERFORMANCE PONTIAC EXHAUST MANIFOLDS
D-Port
Year	Application	Part #	Side	Port/Flange Holes		Miscellaneous
1968	GTO 400 RA	9777641	R	5	3	R-same as 67 GTO RA
		9791637	L	5	2
1969	GTO 400 RA	9797072	R	5	3
	(RA 111)	9791637	L	5	2	L-same as 68 GTO RA
1969	428 H.O.	9797073	R	6	2
	FB 400 RA 111	9779495	L	6	2	L-same as 65- 68 HO. FB
1970	GTO 400 RA 111	9799720	R	3	3
	FB 400 RA 111	478140	L	3	2
Round Port
1968	GTO 400 RA 11	9794033	R	5	3
		9794035	L	5	2
1968	FB 400 RA 11	9794036	R	6	2
		9794038	L	6	2
1969	GTO 400 RA IV	9797075	R	5	3
		9794035	L	5	2	L-same as 1968 (A)
1969	FB 400 RA IV	9797074	R	6	2
		9797038	L	6	2	L-same as 1968 (F)
1970	FB & GTO	9799721	R	3	3	All 1970 and later
	400 RA IV	478141	L	3	2	manifolds are 3 bolt port.
						Except 455 SD.
1971-72	FB & GTO	9799721	R	3	3	R-same as 1970 A & F
	455 H.O.	478141	L	3	2	L-same as 1970 A & F
1973-74	FB 455 SD	490802	R	5	3
		490803	L	5	2
1975	FB 455	496002	R	5	3
		495624	L	5	2