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1970 Firebird Formula 400 Dual Snorkel Air Cleaner


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OEM 1970 Pontiac Firebird Formula 400 Dual Snorkel Air Cleaner. The assembly has been refinished in semi-gloss black to present a period correct image. The base features the dual oval snorkels with ThermAC vacuum pods in fully functional condition featuring typical factory stamping waves/anamolies in both the tops and snorkel edges. The base is exclusive to 1970 1/2 models due to the addition of the carburetor vent hole found in the 71-72 models. The base is complete with the correct ATS, retainer, and new white-striped vacuum line. The exterior features an exclusive reproduced "RM" coded Air Cleaner Service Decal (RM=70); note that this particular decal is extremely difficult to find. The base features the correct deep drop required for proper hood clearance, as well as the angled flange that parallels the base level with the sloped hood line of the F-body. Note that there are substantial differences between the flange drop of the GTO air cleaner bases as compared to the F-body cars - hood clearance is the primary issue and the shallower A-body drop will not properly clear the sloped F-body hood line.

A reproduction triple-plated chrome lid installs on top of the heavy duty air filter and enhances the assembly. To complete the package, a period correct chrome wing nut and an original FB59 filter breather replete with new insert are included. 

This assembly is in nice condition and will enhance your restoration. Best of all, it is a rare genuine GM part!

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




This assembly is correct for the following 1970 models:


Firebird Formula 400*

*only 7,708 Formulas were built for 1970 - largely attributed to the late engineering requirements and subsequent delayed production start-up midway through the model year (aka 70 1/2). Subtract those featuring the Ram Air option and that number falls even lower.

Note: it will fit 71-72 cars as well, but lacks the carburetor vent tube hole provision.

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




The assembly will fit factory 4 barrel Quadrajet carburetors with a 5 1/8" diameter flange, as well as Holley (it will NOT fit double pumpers; i.e. models 4150/4160), Carter/Edelbrock variations without an electric choke (some adjustment to the carburetor alignment tangs may be required). 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.



We ship with


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Estimated insured shipping costs:

            US  $20-$30 

            Canada / Hawaii / Alaska $45 +/-

            Scandinavia  $65 or less

            Australia  $95 or less