Restoring American Muscle Car and Classics - we help your engine breath easier!



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OEM 1977 78 79 Pontiac Trans Am 403 L80 Oldsmobile Shaker Air Cleaner Assembly. This piece has been refinished in 60% gloss black to present a period correct image. The round 4" snorkel is in good condition, feeding air through the functional ThermAC pre-heater, and into a clean base with air deflector (it was previously repaired and the ThermAC vacuum outlet is indexed 90 degrees off). The base includes the correct clear air temperature sensor with spring clip, along with yellow-striped vacuum hoses. The base features the correct deep drop required for proper shaker hood clearance, as well as the angled flange that parallels the base level with the sloped hood line.  The exterior features the correct GM Licensed Air Cleaner Service Decal (PN=Olds 77-79) to add further authenticity. The assembly includes the Olds specific adapter grommet installed on the side - still soft and supple. The shaker lid is in good condition as well. To complete the package, a period correct wing nut and new heavy duty air filter are included. 

This assembly is in good condition and will enhance your restification. 

For further information on the restoration process, please contact us.




This assembly is correct for the following 1977 78 79 models:


Trans Am with 403 Olds engine

This assembly cannot be used on Pontiac 301/400/455 or Chevrolet 305/350 engines due to the size (301) or offset of the base plate as related to the carburetor flange, as well as the height of the requisite shaker base plate adapter.

Note: this will NOT fit the L78 400 Pontiac engines due to the offset of the shaker scoop, as well as the difference in carburetor flange drop. 





The assembly will fit factory 4 barrel Quadrajet carburetors with a 5 1/8" diameter flange, as well as some Holley, Carter/Edelbrock variations without an electric choke (the alignment tangs have been altered). If you have modified your carburetor or intake manifold, please inquire first prior to bidding to ensure fitment is correct. Return requests for non-fitment will not be honored.





The assembly will ship within one day (usually the day of payment) with shipping/tracking information provided.



This assembly is guaranteed to match the item description – customers have up to 14 days to return the assembly after receipt if it is not as described.



Assemblies must be returned in the original packing – customers are responsible for return shipping charges. A refund will be issued upon receipt of the inspected assembly. Returns for non-fitment will not be honored – please ask questions first.



In the event of shipping damage, customers must save all packaging and send 5 digital pictures so Musclecar Air Cleaners can initiate a shipping damage claim.




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Estimated insured shipping costs:

            US  $20-$30 

            Canada / Hawaii / Alaska $45 +/-

            Scandinavia  $65 or less

            Australia  $95 or less