AEM C.A.S. 12-15 BMW 320/328 L4-2.0L F/l Cold Air Intake

Brand: AEM

Product Code: 21-785DS

Availability:In stock

  • Designed to increase horsepower
  • Air filter lasts up to 100,000 miles before cleaning is required (depending on driving conditions)
  • Washable and reusable oil-free filter media
  • AEM logo on the airbox cover
  • Backed by AEM Limited Lifetime Warranty


The AEM 21-785DS fits some BMW 228i, BMW 320i, BMW 328i, and BMW 428i models.

The AEM-21-785DS is designed to replace the restrictive air filter and airbox of some BMW 320i and 328i models with 2.0L turbo 4 cylinder engines. This enclosed system is designed with an upper and lower airbox to maximize air supply to the air filter, and acts as a heatshield. The cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). A MAF sensor extension and other hardware is provided for the installation. An AEM logo provides the finishing touche on the airbox cover. Designed to increase horsepower this air intake system also gives the BMW's engine a facelift. The air intake system is backed by AEM's Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards, while others are 50 state legal. View the 21-785DS vehicle applications to determine the legal status for each vehicle. 


AEM 21-785DS Product Specifications
Estimated Horsepower Gain 14 HP @ 4700 RPM
Replacement Filter 21-1015DK
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Air Filter Outlet Shape Round
Clamps Included No Clamps Required
Clamp Material No Clamps Required
Clamp Style No Clamps Required
Couplers Included None
Product Style AEM Cold Air Intake System
Intake Pipe Color / Finish Black
Intake Pipe Material High-Density Polyethylene
Street Legal In All US States No
TUV Approved (Europe) No
Weight 14.5 lb (6.6 kg)
Product Box Height 10.6 in (269 mm)
Product Box Length 35.4 in (899 mm)
Product Box Width 13.3 in (338 mm)
California Restricted Not legal for sale or use in California
Mounting Hardware Included Yes
Warranty Limited Lifetime