With traditional dropped base air cleaners air enters the filter and then changes direction multiple times to get through the carburetor, this causes turbulence, friction, and heat.  The flat air cleaner eliminates this turbulance and provides a smooth transition to the carburator.  The flat air cleaner bottom moves the air cleaner farther away from the engine heat, so air comes in, stays cooler, and just rolls down into the carburetor.  
Flat bottom air cleaner top. 14 Inch spun aluminum air cleaner top. Uses standard 14 Inch diameter air filters. Up to 12 hp increase over drop base air cleaner.
Speedway Motors 14 Inch Flat Air Cleaner Top, Spun Aluminum Speedway Motors
Speedway Motors 14 Inch Flat Air Cleaner Top, Spun Aluminum
Sku # 91011071
Mfr. Part # 91011071
Condition
New
Brand
Speedway Motors
Sold
Each
Details

With traditional dropped base air cleaners air enters the filter and then changes direction multiple times to get through the carburetor, this causes turbulence, friction, and heat.  The flat air cleaner eliminates this turbulance and provides a smooth transition to the carburator.  The flat air cleaner bottom moves the air cleaner farther away from the engine heat, so air comes in, stays cooler, and just rolls down into the carburetor.  

  • Flat bottom air cleaner top
  • 14 Inch spun aluminum air cleaner top
  • Uses standard 14 Inch diameter air filters
  • Up to 12 hp increase over drop base air cleaner
Specs
Housing Component
Top Plate
Housing Style
Solid Top
Overall Diameter
14.270"
Shape
Round
Housing Material
Aluminum
Housing Finish
Natural
Housing Color
Natural
Overall Height
1.448"
Sold in Quantity
Each
MFG. Part #
91011071
Notes
Minimum filter height required is 4"
Reviews

SUPER COOL SPUN AIR CLEANER LID

Rated
Product Rating
by DILLYDALLY on October 04, 2025

Summary: "BOLTS" RIGHT UP AND LOOKS GREAT! WILL DEFINATLY BE GETTING ANOTHER!

Yes, I recommend this product.

Great product, good price point

Rated
Product Rating
by 30k on July 11, 2024

Summary: I use this on a 602 crate and it shows gains on the dyno.

Yes, I recommend this product.

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Tech Support
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.