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

1973-79 Pontiac Trans Am 400 403 455 Air Cleaner Fresh Air Duct Set OEM


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OEM 1973-79 Pontiac Trans Am Pontiac W72 400/455 Shaker Air Cleaner 3 Piece Fresh Air Duct Set. This is an OEM set of Pontiac Trans Am fresh air ducts for the W72 cars equipped with the oval snorkel. The set goes from air cleaner oval adapter, 4"  elbow, and on to the the fender inlet - is all included with mounting hardware too. This is a complete ductwork package that makes installation 100% factory correct and functional-add our optional 4" fresh air hose (available separately).

This is a nice set and presents well. Best of all, it is a genuine GM part!

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




This assembly is correct for the following 1973-79 models:


Trans Am with 400 Pontiac engine: W-72 (73-76, 78-79 specific due to 6" oval snorkel inlet); L78 400.

Note:it will also fit 77 cars, but in incorrect (they used the round snorkel inlet). The two fender pieces will also work with the Olds 403, but these engines featured the 4" round hose fitting on the end of the snorkel as opposed to the oval inlet requiring the adapter.

*It will also fit 455 Pontiac engines transplanted into 400 cars. 


Note: this will NOT fit the Pontiac 301/Chevrolet 305/350 engines due to the smaller 3" diameter round elbow inlet on the air cleaner and elbow adapter.





The assembly will fit factory W-72 oval snorkel air cleaner assemblies resting on the factory inner fender wells as described above. 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.



We ship with


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Estimated insured shipping costs:

            US  $10-$20 

            Canada / Hawaii / Alaska $35 +/-

            Scandinavia  $55 or less

            Australia  $75 or less