AEM® 1-4003 - Pre-Filter

51 reviews / Item # mpn1637424
AEM® - Pre-FilterAEM® - Pre-FilterAEM® - Pre-FilterAEM® - Warranty InformationAEM Authorized DealerAEM Special OffersAEM Special Offers
● In Stock (6) - Usually ships within 24 hours
Universal Fit
Fitment Notes:
  • Not Vehicle Specific
Add To Cart
Have a Question? 800.505.3274
Ask a Specialist: Live Chat
Authorized Dealer:AEM
Lowest Prices. Price match guarantee
Guaranteed Fitment. Always the correct part
In-House Experts. We know our products
Easy Returns. Quick & Hassle Free

Product Details

Learn everything you want to know about this product
to make an informed purchase.

AEM Accessories

Universal Pre-Filter (1-4003) by AEM®. This handy accessory for the Dryflow™ filter prevents the filter from becoming saturated if splashed by water and mud. When used in dusty conditions it can also extend the filter cleaning interval by filtering and keeping much of the dirt from the Dryflow filter.

AEM Filter Technology AEM Cleaning Instructions About AEM


  • Treated to be water repellent
  • Protects the Dryflow filter from becoming saturated when splashed
  • Extends filter cleaning intervals in dusty conditions by filtering and keeping dirt from the Dryflow filter
  • Stops small dirt particles without creating restriction
  • A Pre-Filter wrap is available for most Dryflow filters

When you purchased an AEM Dryflow filter you made an investment in your car. Why not protect that investment with an AEM Pre-Filter wrap? The Pre-Filter is engineered to protect the filter under most driving conditions. Every Pre-Filter is treated with a proprietary water repellent to prevent splashes of water or mud from saturating the filter. The Pre-Filter is also your first line of defense when driving in harsh, dusty environments. The Pre-Filter traps small dirt particles, keeping much of the dirt from reaching the filter, thereby extending the length of time between necessary filter cleanings. Each AEM Pre-Filter is embossed with the AEM logo, and Pre-Filters are available for most Dryflow filters.

John Concialdi and Bob Sullivan co founded AEM in 1987 as a tuning performance shop in Compton California. Both men had extensive technical backgrounds in engines and engine airflow, and in a short time AEM became the go-to company for performance modifications. By 1993, when the company relocated to Gardena California, it had become commonplace to see cars wearing the bright yellow AEM logo winning races. AEM tirelessly dyno tested and worked closely with racers and auto manufacturers in an effort to understand intake energy dynamics. This resulted in the sale of their first air intake kit in 1994. AEM can boast a number of firsts and unique products: They’re the first manufacturer to make an intake system with specific tube lengths and diameters to take advantage of pressure waves in the inlet tract; they developed the first dual chamber intake kit; they designed an air bypass valve to prevent hydro-lock should the air filter ingest water; and they created one of the first hybrid intake systems for modified cars. AEM continues to create innovative products to help you get more power from your car.

Part Number:

Vehicle Fitment

This part is universal
Year Make Model Fitment Notes:
ALL       ALL        ALL         This part is universal

    Product Reviews


    Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

    AEM® - Pre-Filter
    AEM® 1-4003 - Pre-Filter
    Average Rating: 5 of 5
    5 of 5
    AEM Pre Filter
    Posted by (Worland, WY) /

    Not really tested but installed and seems to work on the Brute Force intake just fine.

    Was this review helpful for you? Yes3   people found this review helpful.
    AEM® - Pre-FilterAEM® 1-4003 - Pre-Filter    $31.99
    51 reviews
    Add To Cart