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



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1970-72 Oldsmobile 4-4-2 W-30 455 Outside Air Induction Air Cleaner & Top Assembly. This OAI is a nice reproduction of the original Olds outside air induction air cleaner assembly that completes the W-30 OAI option for the 4-4-2 with the 455 engine. The assembly is new and functions as designed by Oldsmobile. The OAI top features a vacuum actuator with new vacuum line that works properly to operate the fresh air trap door. The housing is excellent and the 455 specific seal is new as well. A matching fresh air air cleaner lid and new heavy duty air filter completes the top assembly requirements.

The 4-4-2 air cleaner base has been refinished in low-gloss black to present a period correct image. The oval snorkel with the formed oval end (as opposed to smaller unit with pressed on end fitting) is in good condition with a functional ThermAC pre-heater along with new white striped vacuum lines. The base is clean and comes with a correct air temperature sensor (ATS) installed with the correct retainer.  The exterior features a GM licensed reproduction Air Cleaner Service Decal (NH=71/72) that sits where originally located.  As an added measure, an original date stamp has been recreated to add a nice touch of authenticity. This assembly is specific to 1970-72 350/455 cars due to the location of the two filter breather outlets (which feature the 90 rubber elbows) and snorkel. Also included are the correct valve hold-down springs and a new air cleaner wing nut that completes the installation more effectively. The base has the correct drain holes which match original OAI bases as well.

This assembly is in nice condition and will enhance your restoration. It is an ideal choice for adding an original W-30 Outside Air Induction (OIA) option if your car didn't originally have it. Best of all, it is a genuine GM licensed restoration part! 

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



This assembly is correct for the following 1970-72 455 models:


4-4-2, Cutlass Supreme, Rallye 350, Hurst Olds


*While this assembly is set up for the 455, a change of the foam will adapt it to 350/400 engines. 




The assembly will fit factory 4 barrel carburetors (Rochester Quadrajet) with the 5 1/8" diameter flange. If you have modified your carburetor, intake manifold or valve covers, 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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