Edelbrock Signature Series 14" Chrome Air Cleaner — 18‑Gauge Steel, 5-1/8" Carb Fit, Crankcase Vent Adapter

The Edelbrock 1221 Signature Series Air Cleaner is a 14" triple-chrome plated, 18-gauge steel round air cleaner engineered to pair with Signature Series valve covers and fit popular 5-1/8" carburetors while providing crankcase ventilation options.

This polished Edelbrock air cleaner brings a finished, high-quality look to classic and restomod engines while maintaining the clearances and fitment that street and show builders need. Stamped from durable 18-gauge steel and finished with triple chrome plating, the 1221 is designed to match Edelbrock Signature Series valve covers and to work seamlessly with common 5-1/8" diameter carburetors. The 14" version includes base knockouts and a crankcase ventilation adapter for cleaner engine bay routing.

Will this air cleaner fit my carburetor and valve covers?

Yes—the 1221 Signature Series is built to accommodate most popular 5-1/8" diameter carburetors and is dimensioned to align with Edelbrock Signature Series valve covers. Its flange depth and included adapters help ensure correct clearance and connections.

• Fits standard 5-1/8" carburetor openings
• 3/8" deeper flange for compatibility with Edelbrock carburetors
• Designed to visually match Signature Series valve covers
• Includes crankcase ventilation adapter and base knockouts on 14" model

How durable is the construction and finish?

The 1221 uses heavy 18-gauge steel for a rigid base structure and is finished with triple chrome plating to resist corrosion and maintain a show-quality shine. This combination gives a sturdy unit that still polishes up for concours-level presentation after care and maintenance.

• Stamped from 18-gauge steel for strength
• Triple chrome plating for corrosion resistance and gloss
• Factory-formed seams for a consistent, showroom appearance

What are the exact dimensions and ventilation features?

The 14" model provides a 3" filter element and an overall height of 3-3/4", giving a compact profile that still supplies ample air flow for street applications. The base includes knockouts and ships with an adapter to route crankcase ventilation into the intake system.

• 14" diameter with 3" element height
• Overall height: 3-3/4" for low-profile fitment
• Base knockouts and crankcase ventilation adapter included

How does installation affect clearance and tuning?

The slightly deeper 3/8" flange helps with carburetor-to-cover clearances, reducing the chance of interference with fuel bowls, linkage, or air cleaner stud hardware. Installation is straightforward on engines with standard manifolds and carburetor studs but always verify hood and shroud clearance before final tightening.

• 3/8" deeper flange improves fit with Edelbrock carbs
• Low overall height minimizes hood clearance issues
• Simple bolt-on installation using standard studs and gaskets

Who is this for? The Edelbrock 1221 Signature Series air cleaner is aimed at classic car restorers, street/strip builders, and anyone seeking a coordinated, factory-quality appearance between valve covers and intake components. It’s particularly useful for owners of small-block V8s and restomod projects that use standard 5-1/8" carburetors and want a durable, polished finish with built-in crankcase ventilation options.