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

1971 Mr. Norms 340 Tripower Air Cleaner with K&N Filter


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1971 Dodge Demon GSS 340 Tri-power Air Cleaner. This assembly has been refinished in wrinkle black and natural aluminum to present a period correct image. The base is in excellent condition and features the Holley carburetor flanges designed to work with the Mopar Six Pack/Six Barrel set-ups. The exterior features the correct "TRI POWER" callout - a standard with Mr. Norms no nonsense approach towards providing high performance for the 71 340 Demons.  

To complete the assembly, a new custom K&N air filter (not the bulky industrial conversion) and a pair of period correct wing nuts with studs are included. The wrinkle paint is very nice - it features typical surface characteristics to match the factory finish. The casting process also features typical factory flaws - hard to see once installed, but mentioned for clarity.

A note about the air filter. Original air filter elements are long since gone and only a handful of originals remain - we have one of them! It is used as a template to create customized filters that allows owners to use them as intended. The K&N filter in this assembly is 3/8" taller than the original one, but is the closest size available for height and width made by K&N. If you would prefer a custom paper element that is shorter in height, please let us know and we will include it instead of the K&N (we do NOT sell the air filters individually - they are used exclusively for restored air cleaner assemblies only).

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

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


Mr. Norm Krause was a high performance Mopar dealer based in Chicago during the heyday of musclecars and continues that legacy today. Due to his insightfulness and determination, he created the 67 383 Darts/Barracudas. In 68, he upped the ante to create the 440 Darts/Barracudas - when Mopar finally realized they could do this without too much modification, they joined in as well. 

For 1971, he chose the Demon 340 platform to slip one past the EPA. He added the Edelbrock 340-6 set-up to the Demon, but needed an air cleaner that would clear the hood. An off-the-shelf Tri-Power aluminum air cleaner - sourced from a now defunct California based company named Segal Industries - provided the assembly. Contrary to the Ford enthusiasts, this piece was initially designed for the 67 427 Corvette Tri-Power cars - hence the reverse nature of the call-out which was correct when viewed from the rear of the forward tilting Corvette hood. He went on to continue his high performance approach by adding a Paxton Supercharger to the 72 Demon 340 GSS as well. 



This assembly is correct for the following 1971 340 high performance models:


Demon GSS


It will fit A/B/C/E-body cars ranging from 68-73 using the Mopar Six Pack/Six Barrel carburetors requiring lower hood clearance.




The assembly will fit factory 6 barrel carburetors (Holley). 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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Typical shipping costs:

            US  $20-$28

            Canada / Hawaii / Alaska $40 +/-

            Scandinavia  $55 or less

            Australia  $75 or less