Edelbrock 1203 Pro-Flo 10in Satin-Black Round Air Cleaner — Fits 5-1/8in Carb, 2in Paper Element

The Edelbrock 1203 Pro-Flo is a satin-black 10" round aluminum air cleaner with a 2" replaceable paper element designed to fit 5-1/8" diameter carburetors and provide reliable filtration plus a clean, period-correct appearance.

This compact air cleaner is built for classic and performance carbureted engines where space, style, and serviceability matter. Constructed from aluminum with a satin-black finish and a white Edelbrock logo, the 1203 Pro-Flo pairs vintage looks with practical features such as a 2" paper filter element and a base knock-out for crankcase breather connections. Its 10-inch diameter and 3.5-inch overall height make it suitable for tight engine bays while remaining compatible with many popular carburetor models.

Which carburetors will this Edelbrock air cleaner fit?

The 1203 Pro-Flo is sized to work with carburetors that measure 5-1/8" in diameter. It is compatible with a wide range of factory and aftermarket units commonly used on small- and big-block V8s.

• Fits Edelbrock Performer and Thunder Series AVS carburetors.
• Compatible with Holley, Thermo-Quad, Quadrajet, and Carter AFB models.
• Works with most carburetors having a 5-1/8" throttle bore flange.

How is the Pro-Flo 1203 constructed and finished?

This model uses an aluminum housing finished in satin black to resist corrosion and present a clean, period-appropriate look. The Edelbrock logo is printed in white for contrast, and the unit is measured precisely so fitment is predictable.

• Aluminum housing for strength with reduced weight.
• Satin-black coating resists surface rust and offers factory-style appearance.
• White Edelbrock logo for clear branding and vintage aesthetic.
• Dimensions measured from gasket flange to top of retaining nut, accurate within 1/8".

What are the filtration and service features?

The 1203 ships with a 2" tall replaceable paper element that balances airflow and particle filtering for street and mild-performance use. The element is user-serviceable and easy to swap when maintenance is due.

• 2" paper filter element is replaceable and economical to maintain.
• Simple retaining nut removal for fast access to the element.
• Paper media provides good filtration for typical driving conditions.

Can I attach a crankcase breather to this air cleaner?

Yes—the base of the 10" Pro-Flo includes a knock-out provision for a crankcase breather connection. When paired with Edelbrock's separate crankcase ventilation adapter, you can route blow-by gases into the clean side of the air cleaner for cleaner engine bay operation.

• Base features knock-out hole to install a breather fitting.
• Works with Edelbrock crankcase ventilation adapter #1205 (sold separately).
• Helps centralize ventilation plumbing and maintain a tidy engine compartment.

Who is this for? The Edelbrock 1203 Pro-Flo 10" round air cleaner is aimed at classic car owners, restomod builders, and daily drivers using 5-1/8" carburetors who want a compact, attractive intake accessory that’s easy to service. It’s especially useful where vertical clearance is limited but you still want reliable filtration and a factory-inspired look. Choose this unit if you need a lightweight aluminum housing, replaceable paper element, and the option to attach crankcase ventilation hardware to keep the engine bay tidy.