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Moroso 66390 - Air Cleaner Stud Adapter, Adapts 1/4 Inch Wingnut To 5/16 Inch Carburetor

Since 1968, Moroso Performance Products is one of the worlds most respected suppliers of automotive equipment for racing and street performance applications!

Air Cleaner Stud Adapter
Holley® H.P. Series/DEMON®/Carbs w/5/16 in. -18 Air Clnr Mnt
L-5/16 in.
5/16 in. -18 Male Thrd To Carb
0.25 in. -20 Female Thrd To Air Clnr Std
Availability: Will be special ordered for you.
Pricing: $11.99


• Allows Moroso and other air cleaners with 1/4" stud and wing nut to be used on carburetors with a 5/16" mounting hole
• One end of the adapter features a 5/16" -18 male thread that screws into the carburetor, the other end features a 1/4" -20 female thread that accepts a standard air cleaner mounting stud
• Clear zinc plating resists corrosion
• Overall length: 7/8"
• One per pack.

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • 66390
  • 66390
  • 084663663901
  • Moroso
  • Will be special ordered for you.
  • New


Shipping Information

  • Item Requires Shipping
  • 0.0 lbs.
  • W3.7500” x H0.7500” x L5.0000”

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California Residents: Prop 65

WARNING: Cancer and Reproductive Harm -