K&N Air Filter

• Product Details

  K&N replacement filters are designed for all motorcycles and ATVs to O.E.M. (manufacturer) size specifications and fit into your original O.E.M. air box without modification or jet changes.

  • Due to design and unique high flow characteristics, K&N filters allow engines to breathe free and produce optimum horsepower.
  • Under most conditions K&N air filters never need to be replaced - with proper cleaning and care, K&N air filters will last the life of your engine.
  • Designed to increase horsepower and acceleration while providing excellent filtration.
  • K&N air filters use a four-layer cotton gauze filter membrane with a large surface area to improve airflow and offer longer service intervals.
  • K&N air filters feature an epoxy-coated aluminum wire mesh incorporated into the back-fire screen to protect the filter element.
  • K&N air filters are washable and reusable.
  • Simple drop-in performance.
  • Lifetime air filter with K&N Million Mile Limited Warranty.
  • The world's best air filter.

  Filter Specifications:

  • K&N part number: BM-0400.
  • Air filter shape: Round.
  • Filter material: Cotton gauze.
  • Filter re-oiling amount: 0.52 ounces (15 ml).
  • Height: 3.375 inches (86 mm).
  • Inside diameter: 3.0 inches (76 mm).
  • Outside diameter: 4.375 inches (111 mm).
  • Package contents: 1 air filter.
  • Product style: Round air filter.
  • Top style: Open.
  • Weight: 0.6 pounds (0.3 kg).

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• Fitment

• # Part Numbers for the K&N Air Filter

  Product Variant	Manufacturer Part #
  BMW K&N Air Filter	BM-0400

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