Olds 455 Remflex exhaust gasket differences

[tyhardiman]

Remflex makes two sizes of exhaust manifold gaskets for the 455:
One part is 11-002, for 1975 and later with 2 3/16" tall exhaust ports.
and one part is 11-003, for 1974 and earlier with 1 7/8" tall exhaust ports.

Is this a difference between "G" and "J" heads? In other words, could I buy Remflex gaskets based on whether I am working on a "G" head engine vs "J"
head? This would allow me to order the correct gasket prior to pulling the manifold off and measuring.

Thanks in advance,
Ty
--
Ty Hardiman, Norman, OK / Member FMCA-GMCMI-GMC Classics / August 1977 Kingsley TZE167V102390 / 26' / 403 / 3.55 / 16" Wheels / Quadrajet / HEI /
Previous Owners: Basil LeBlanc, Dan Ramker / Original Owner: William Strahm, Loveland, CO

 

[Jim Hupy]

Ka heads have the bigger ports. "J" and "G" have smaller ones. But, 40
years are a long time, and "stuff" happens.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> Remflex makes two sizes of exhaust manifold gaskets for the 455:
> One part is 11-002, for 1975 and later with 2 3/16" tall exhaust ports.
> and one part is 11-003, for 1974 and earlier with 1 7/8" tall exhaust
> ports.
>
> Is this a difference between "G" and "J" heads? In other words, could I
> buy Remflex gaskets based on whether I am working on a "G" head engine vs
> "J"
> head? This would allow me to order the correct gasket prior to pulling the
> manifold off and measuring.
>
> Thanks in advance,
> Ty
> --
> Ty Hardiman, Norman, OK / Member FMCA-GMCMI-GMC Classics / August 1977
> Kingsley TZE167V102390 / 26' / 403 / 3.55 / 16" Wheels / Quadrajet / HEI /
> Previous Owners: Basil LeBlanc, Dan Ramker / Original Owner: William
> Strahm, Loveland, CO
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[LQQKatJon]

I cannot remember the difference. I have had that question before. But the 11-003 should be the one that fits. That is the one i was installing on
my 75 palm beach with 455.
--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/

 

[Carl Stouffer]

Ty,

I have both a "J" head and a "K" head in my garage (sorry, no "G"). I just measured the height of the exhaust ports and both are identical at 1-7/8"
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member