Edelbrock Signature Series 14-inch Air Cleaner, Triple Chrome, 3-inch Filter

The Edelbrock 1221 Signature Series Air Cleaner is a 14-inch, triple-chrome plated steel air intake cover designed to pair with Signature Series valve covers and fit popular 5-1/8" carburetors.

This round air cleaner blends classic show-car shine with functional fitment for street and restored engines. Stamped from heavy 18-gauge steel and finished in a triple chrome plate, it offers a durable, polished look while working with common carburetor setups. The 1221 model includes a three-inch filter element and a deeper flange for compatibility with Edelbrock carburetors, plus a base knockout and crankcase ventilation adapter for cleaner engine bay routing.

Will this air cleaner fit my 5-1/8" carburetor and Signature valve covers?

Yes — the 1221 is designed to work with standard 5-1/8" diameter carburetors and complements Edelbrock Signature Series valve covers for a cohesive appearance. Its build accounts for clearance and sealing needs so installation is straightforward on compatible setups.

• 14" outer diameter with 3" filter element and 3-3/4" overall height for fit balance
• 3/8" deeper flange to clear Edelbrock carburetor profiles
• Stamped from 18-gauge steel for rigidity and stable mounting
• Triple chrome plating matches polished valve cover finishes

How does the 1221 handle crankcase ventilation and engine routing?

The base is fitted with removable knockouts and includes an adapter to route crankcase vapors back into the intake system. That lets you retain a closed breather setup without aftermarket plumbing headaches, preserving engine bay cleanliness and emissions compatibility where applicable.

• Integrated knockouts in base for simple hose connection points
• Includes crankcase ventilation adapter to reconnect PCV or breather hoses
• Factory-style routing reduces visible hoses for a tidy installation

What materials and finishes ensure long-term appearance and strength?

The 1221 is formed from 18-gauge steel and undergoes a triple chrome plating process for a bright, durable finish that resists corrosion and road wear. The robust metal construction keeps the unit from flexing under clamp pressure and helps the air cleaner maintain alignment over time.

• 18-gauge steel stamping provides structural stiffness
• Triple chrome plating gives high-luster shine and corrosion resistance
• Sturdy mounting surfaces maintain seal integrity with repeated service

What are the exact dimensions and installation notes I should expect?

The 1221 measures 14 inches in diameter and has a total height of 3-3/4 inches, accommodating a 3-inch replacement filter element. It’s engineered for bolt-on installation over popular carburetors; check carburetor stud spacing and available hood clearance before fitting larger aftermarket intakes or scoop setups.

• 14" diameter, 3" element, 3-3/4" overall height
• Works with common 5-1/8" carburetor openings and Edelbrock hardware
• Verify hood clearance when used with tall air scoops or stacks

Who is this for: The Edelbrock 1221 Signature Series Air Cleaner suits restorers, street-rod builders, and performance enthusiasts seeking a show-ready chrome solution that matches Signature Series valve covers. It’s ideal for drivers who want factory-style fitment, simple crankcase ventilation routing, and a robust metal assembly that looks as good under the hood as it does at car shows.