Outerwear Pre-Filter, 14 Round, 4 Tall, Black

OVERVIEW

When you are pushing your air-cooled machine through the punishing sands of Glamis or the dusty trails of the Midwest, your engine''s primary line of defense is its air filter. However, even the best high-performance filters can quickly become choked with silt, sand, and debris, leading to a massive drop in horsepower and potential internal engine damage. That is where the Outerwears Pre-Filter comes into play as an essential upgrade for any serious enthusiast. This black, 14-inch round by 4-inch tall pre-filter is engineered using a proprietary polyester mesh that features uniform micron openings. It acts as a primary stage of filtration, stopping particles as small as .005 inches before they ever reach your expensive primary filter element. By keeping the heavy "trash" off your main filter, you ensure that your Volkswagen''s intake system maintains maximum CFM (cubic feet per minute) for a longer duration, providing the consistent air-to-fuel ratios required for peak performance.

Beyond just stopping dust and dirt, this Outerwears pre-filter is a masterpiece of functional design, specifically treated with a hydrophobic water-repellent process. For the off-road racer or the street-performance driver caught in a sudden downpour, this means water beads up and rolls off rather than soaking into the filter element and causing the engine to bog or stall. The material is also highly UV-resistant, ensuring that it won''t become brittle or fade under the intense sun exposure common in open-engine bay configurations like those found on sand rails, dune buggies, and Baja Bugs. By significantly extending the service intervals of your primary filter, this pre-filter pays for itself by reducing maintenance costs and protecting the precision tolerances of your valvetrain and cylinder walls. Whether you are running a high-performance Weber setup or a large-diameter center-mount air cleaner, this is the professional''s choice for keeping the "grit" out of the "go."

FITMENT

This 14-inch diameter by 4-inch tall round pre-filter is designed to fit a wide variety of high-performance air cleaner assemblies. While it is a universal fit for filters of these specific dimensions, it is most commonly found in the following air-cooled and off-road applications:

• Custom Sand Rails & Dune Buggies: Ideal for large-capacity 14-inch round air cleaner assemblies used on high-displacement Type 1, Type 4, or V8-conversion powerplants.
• Baja Bugs: Fits exposed 14-inch round filters often mounted on luggage racks or high-clearance engine cages.
• Volkswagen Beetle (Type 1): Applicable for performance-built street cars utilizing large-diameter aftermarket air cleaners.
• Volkswagen Karmann Ghia: Fits specialized performance induction systems where clearance allows for a 14-inch housing.
• Volkswagen Bus (Type 2): Suitable for modified Bay Window or Split Window buses running performance center-mount carburetors.
• Universal Performance Applications: Fits any 14-inch round by 4-inch tall air filter from brands like K&N, AEM, and others commonly used in the air-cooled VW industry.

SPECS

The technical specifications of the Outerwears 44-4TBK are designed to meet the rigorous demands of off-road racing and high-performance street use:

• Product Part Number: 44-4TBK
• Shape: Round
• Diameter: 14.000 Inches
• Height: 4.000 Inches
• Material: Proprietary UV-Resistant Polyester Mesh
• Filtration Rating: Stops debris down to .005 inches
• Water Resistance: Hydrophobic (Water Repellent) Treatment
• Color: Sleek Black Finish
• Origin: Made in the USA
• Compatibility: Designed for use with oiled and non-oiled performance air filters

PRO TIPS

1. Proper Cleaning Is Key To Longevity

One of the biggest mistakes owners make is treating an Outerwears pre-filter like a standard rag. To maintain the hydrophobic (water-repellent) properties and the integrity of the mesh, you should never use harsh solvents or high-pressure washers. Instead, simply remove the pre-filter and wash it in a bucket of warm water mixed with a mild liquid dish soap. Gently agitate the material by hand to loosen the dirt, rinse thoroughly with low-pressure water, and always let it air dry completely before re-installing. Never put it in a mechanical dryer, as the heat can shrink the polyester mesh and ruin the fitment on your 14-inch filter housing.

2. Ensure A Seamless Seal During Installation

When you slide your Outerwears pre-filter over your 14x4 air cleaner, ensure that the elastic or the edges are seated perfectly flush against the top and bottom plates of the air cleaner assembly. If there is even a small gap or if the mesh is bunched up, dust and silt can "bypass" the pre-filter and head straight for your primary element. A tight, smooth fit ensures that 100% of the incoming air is forced through the micron-rated mesh. If you are running in extremely muddy conditions, check the pre-filter periodically to ensure that heavy mud hasn''t pulled the edges away from the filter base.

3. Monitor For Hydrophobic Degradation

While the water-repellent treatment on the Outerwears pre-filter is incredibly durable, it is not permanent and can eventually wear down after many wash cycles or extreme exposure to chemicals. You can test the effectiveness by occasionally sprinkling a few drops of clean water on the surface of the dry pre-filter. If the water beads up and rolls off immediately, your protection is still intact. If the water begins to soak into the mesh, it is time to replace the pre-filter to ensure your engine remains protected from moisture ingestion during wet rides or when washing your vehicle.