Outerwear Pre-Filter, for EMPI 40mm Solex/Brosol Carb

OVERVIEW

When you are pushing your air-cooled Volkswagen through the punishing environments of the dunes, desert, or even just dusty backroads, your engine''s greatest enemy is airborne debris. The Outerwears Pre-Filter, specifically designed for the EMPI 40mm Solex/Brosol carburetor air cleaners, serves as your first line of defense against engine-killing contaminants. This high-performance pre-filter utilizes a patented micro-mesh nylon filtration system that is engineered to stop sand, dirt, and even moisture before it ever reaches your primary paper or foam air cleaner element. By adding this layer of protection, you aren''t just keeping your intake cleaner; you are significantly extending the service life of your internal filter and preventing premature wear on your cylinder walls and piston rings. The vibrant red material with the iconic EMPI logo doesn''t just look the part on a show-quality engine bayit provides the peace of mind that only professional-grade filtration can offer.

What sets this Outerwears pre-filter apart is its ability to provide superior protection without compromising the airflow your 40mm Solex or Brosol carburetors demand. The elastic base is designed to stretch snugly over the air cleaner assembly, ensuring a secure fit that won''t slip or vibrate loose even under high-RPM vibration or rough terrain. Because the mesh is so precisely woven, it maintains a high CFM rating, meaning you won''t have to worry about rich-running conditions or the need for constant jetting adjustments just to keep your engine breathing. Whether you are running a single progressive setup or a dual carb configuration on a performance-built flat-four, this pre-filter is a mandatory upgrade for any enthusiast who values engine longevity and consistent performance in real-world driving conditions.

FITMENT

This pre-filter is designed to fit the standard air cleaners typically supplied with EMPI 40mm Solex and Brosol carburetor kits. It is commonly used on the following vehicles equipped with these specific carburetor upgrades:

• Volkswagen Type 1: Beetle and Bug (All years)
• Volkswagen Type 1: Karmann Ghia
• Volkswagen Type 2: Bus, Transporter, and Kombi (1600cc based engines)
• Volkswagen Type 3: Squareback, Fastback, and Notchback
• Volkswagen Type 181: Thing
• Custom Applications: Dune Buggies, Sand Rails, Baja Bugs, and Manx-style shells using EMPI 40mm Solex/Brosol induction systems.

SPECS

• Manufacturer Part Number: 43-6142-0
• Brand: Outerwears (Distributed by EMPI)
• Material: Patented Heavy-Duty Micro-Mesh Nylon
• Color: High-Visibility Red
• Logo: White EMPI Screen-Printed Logo
• Closure Type: High-Tension Elasticized Base
• Compatibility: Specifically sized for EMPI 40mm Solex / Brosol style air cleaners
• Primary Function: Stops sand, dirt, and large debris from clogging the primary filter
• Water Resistance: Hydrophobic properties help repel light water spray and moisture

PRO TIPS

1. Proper Cleaning for Maximum Airflow

Never clean your Outerwears pre-filter with harsh solvents or gasoline, as these chemicals can break down the nylon mesh and the elastic base. Instead, use warm, soapy water and a soft-bristle brush to gently remove trapped silt and sand. Always allow the pre-filter to air dry completely before reinstalling it. Using a hair dryer or high-heat source can shrink the nylon, making it nearly impossible to stretch back over your air cleaner housing without tearing it.

2. The "Snap Test" for Fitment Security

When installing the pre-filter, ensure the elastic band is seated entirely below the bottom lip of the air cleaner lid. A common mistake is leaving a portion of the elastic resting on the side of the filter element, which can lead to a "bypass" where unfiltered air enters through the gap. Once installed, give the mesh a light tug; if it snaps back into place and covers the entire surface area of the primary filter, you have a perfect seal that will keep the finest dust out of your venturis.

3. Monitoring for Performance Drops

While these pre-filters are designed for high flow, they can eventually become "loaded" with fine silt in extreme off-road conditions. If you notice your engine starting to stumble at high RPMs or if it feels like it is losing power during a long weekend at the dunes, pull over and tap the pre-filter to knock off the heavy dust accumulation. Because these are translucent, you can often visually inspect the state of the internal filter without taking the whole assembly apart, saving you valuable time in the pits or on the trail.