[2manyT/A'S]

I'm sorting through some parts here and have two different diameters of T/A shaker air filter "domed" lids....13 1/4" & 14 1/4".........don't remember whch one is early vs later and no cars handy to check....

Looked in the parts book,but it offered no clue.....

[Norwood]

WOW.......this question coming from you shocks me... The early lid is 13.250 LOL

[Held for Ransom]

Then what came on the later 403 TA shakers?

[2manyT/A'S]

Originally Posted by Held for Ransom

Then what came on the later 403 TA shakers?

The later Pontiacs and Olds came with 14 1/2" and 80-81 301 and 305 were smaller without a dome....as I recall.............

[2manyT/A'S]

Originally Posted by Norwood

WOW.......this question coming from you shocks me... The early lid is 13.250 LOL

You ain't seen nothing YET!

That's what I thought,just needed confirmation quickly...........before I gave the WRONG one away....

[Held for Ransom]

No, the 403 TA shakers came with the same 13-1/4" lid, I'm pretty sure.
1970-5 Pontiac TA (and '74 GTO) shakers had the 13-1/4" lid.
1976-9 Pontiac TA shakers had the 14-1/4" lid. Don't know about the Can Am units.

[2manyT/A'S]

Originally Posted by Held for Ransom

No, the 403 TA shakers came with the same 13-1/4" lid, I'm pretty sure.
1970-5 Pontiac TA (and '74 GTO) shakers had the 13-1/4" lid.
1976-9 Pontiac TA shakers had the 14-1/4" lid. Don't know about the Can Am units.

Shows you what I know about Oldsmobiles.....

Are you sure on 75-76 being the change up year?

[Held for Ransom]

I have a '75 455 TA shaker air cleaner base and it calls out the A366C filter and the lid is 13-1/4". They may have changed at some point in the '75 model year, but '76 and up used the A542C filter in the Pontiac engined shakers (again, I don't know about the Can Am), which used the 14-1/4" lid. The 1977-9 Olds 403 shaker bases call out the A366C filter, thus the 13-1/4" lid.

[Alvin]

Originally Posted by 2manyT/A'S

I'm sorting through some parts here and have two different diameters of T/A shaker air filter "domed" lids....13 1/4" & 14 1/4".........don't remember whch one is early vs later and no cars handy to check....

Looked in the parts book,but it offered no clue.....

With sunshine & 70 degrees F today, broke out the '78 TA, garage cleanup etc.

BTT & FYI: '78 TA Lid is 14.250" same for our '79.