4" Chrome Steel 2 5/8" Neck Flat Air Cleaner Base

• Chrome steel flat base for a clean engine-bay finish

• Base only — pairs with a compatible top and filter for a full assembly

• Fits carburetors with a 2 5/8" neck diameter, single-barrel sized

• Filter sits raised 3/4" for carburetor and clearance management

This chrome steel flat base is built for universal carbureted air-cleaner applications, fitting carburetors with a 2 5/8" neck diameter in a compact 4" round size. It's sized for small single-barrel carburetor applications. It's built as a base-only component, so it requires a separately purchased compatible top and filter element to form a complete air-cleaner assembly.

The flat base design places the filter raised 3/4" above the base, which helps manage carburetor clearance, overall air-cleaner height, and installation layout. Steel construction with a chrome finish supports stable mounting and a clean engine-bay appearance.

Before ordering, verify carburetor neck diameter, filter height, top fitment, and hood clearance, and confirm throttle linkage clearance, breather routing, fuel-line clearance, and stud length for final assembly.

Applications
Fits carburetors with a 2 5/8" neck diameter, sized for small single-barrel carburetor applications; commonly used on economy and 6-cylinder engines with factory 1-barrel carburetors, and on restoration projects with original 1-barrel setups.

Sizing
4" round diameter, flat base style, 2 5/8" neck flange, filter raised 3/4". Base only — requires a separately purchased compatible top and filter element.

What carburetor neck diameter does this base fit?
This air cleaner base is designed for carburetors with a 2⅝-inch neck (air horn) diameter.

Will this fit a 2-barrel or 4-barrel carburetor?
No. This air cleaner base is designed for small single-barrel carburetors with a 2⅝-inch neck diameter. It is not compatible with 2-barrel or 4-barrel carburetors.

Does this include the top and filter, or just the base?
This listing is for the air cleaner base only. A compatible top and filter element must be purchased separately to complete the air cleaner assembly.

What does "filter raised 3/4"" mean?
The flat base positions the filter element ¾ inch above the base, affecting the overall assembled height and available hood clearance. Be sure to account for this when measuring your installation.

Will this fit any 4" round air-cleaner top?
Not necessarily. Verify the top diameter, center stud, and sealing surface are compatible with your existing 4-inch round air cleaner top before ordering.