Air Cleaner Assembly, Fits IDF & HPMX 4.5x7 Oval, 3.5 Tall

OVERVIEW

When you''re running a high-performance air-cooled engine, the quality of the air entering your carburetors is the lifeblood of your machine. This EMPI Air Cleaner Assembly is specifically engineered for those demanding the perfect balance of classic aesthetics and uncompromising filtration. Designed to fit the industry-standard Weber IDF, EMPI HPMX, and Dellorto DRLA series carburetors, this 4.5x7-inch oval assembly provides a significant upgrade over restrictive stock setups. The 3.5-inch height is the "sweet spot" for performance enthusiasts; it offers a larger internal volume and surface area than shorter "low-profile" filters, allowing your engine to breathe deeply during high-RPM pulls without the choking effect of smaller elements. Whether you''re cruising the boulevard in a show-quality Beetle or tearing up the dunes in a rail, this chrome-topped beauty ensures your venturis stay clear of debris while looking sharp under the decklid.

Constructed with durability and longevity in mind, this assembly features heavy-duty chrome-plated steel top and bottom plates that resist the vibration and heat common in the VW engine bay. The heart of the unit is a high-flow, washable cotton gauze element that provides superior filtration compared to cheap paper alternatives. This gauze material is designed to capture microscopic particles while maintaining a high CFM (Cubic Feet per Minute) airflow rate, which is essential for maintaining the precise air-fuel ratios required by dual-carburetor setups. Because it is washable and reusable, this is the last air cleaner you''ll likely ever need to buy for your IDF or HPMX carbs. It''s not just a part; it''s an investment in your engine''s longevity and your peace of mind when the dust starts flying on the trail or the track.

FITMENT

This air cleaner assembly is designed for dual or single carburetor applications using the following carburetor models:

• Weber: 40 IDF, 44 IDF, 48 IDF
• EMPI: 40 HPMX, 44 HPMX, 48 HPMX
• Dellorto: 36 DRLA, 40 DRLA, 45 DRLA, 48 DRLA

Common vehicle applications include, but are not limited to:

• VW Beetle (Type 1): 1950 through 1979 (Check decklid clearance)
• VW Karmann Ghia: 1956 through 1974
• VW Bus / Transporter (Type 2): 1950 through 1979
• VW Type 3 (Squareback, Fastback, Notchback): 1961 through 1973
• Dune Buggies, Sand Rails, and Manx-style shells
• Custom VW Trikes and Kit Cars

SPECS

• Product Type: Oval Air Cleaner Assembly
• Manufacturer: EMPI (Part Number A1004 / 00-8714-0)
• Base Plate Material: Stamped Steel with Chrome Finish
• Top Plate Material: Stamped Steel with High-Lustre Chrome Finish
• Filter Media: Red Washable Cotton Gauze
• Overall Width: 4.5 Inches
• Overall Length: 7 Inches
• Total Height: 3.5 Inches
• Mounting Hardware: Includes center stud and top nut for secure installation
• Gasket Included: Base-to-carburetor gasket included

PRO TIPS

1. Don''t Forget the Filter Oil

While the cotton gauze element looks ready to go out of the box, it is vital to remember that these are "wet" filters. To achieve maximum filtration efficiency, you must apply a high-quality air filter oil to the gauze. The oil is what actually traps the fine dust particles that can cause premature wear on your cylinder walls and rings. Apply the oil evenly until the red color is consistent across the pleats, but be careful not to over-saturate it, as excess oil can be sucked into the carburetor and gum up your air air jets. Always allow the oil to "tack up" for about 20 minutes before starting the engine.

2. Verify Your Decklid Clearance

The 3.5-inch height of this filter is fantastic for airflow, but it is taller than the standard 2-inch "pancake" filters often found on dual-carb kits. Before slamming your decklid shut, especially on a Beetle or Ghia, verify that there is enough room between the top of the air cleaner and the body of the car. If the fit is too tight, you may need to use decklid stand-offs or "pop-outs" to create the necessary space. A tight fit can cause the air cleaner to rub against the paint or, worse, put downward pressure on the carburetor linkage, leading to throttle sticking or inconsistent idling.

3. Ensure a Perfect Base Seal

One of the most common mistakes during installation is failing to ensure the base plate sits perfectly flat on the carburetor top. When installing the base plate, check that it clears the velocity stacks (if equipped) and that the gasket is perfectly aligned. If there is even a tiny gap between the carb and the base plate, your engine will suck in "unfiltered" air, completely bypassing the filter element. Tighten the center nut firmly but do not over-torque it, as you can bow the top plate, which will compromise the seal around the perimeter of the gauze element. A snug, even fit is the key to engine longevity.