K&N BMW Maintenance & Tune-Up Parts for BMW E21 320i M10 1.8L

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Part of owning a BMW is the relationships we develop with our cars through years of driving pleasure and maintenance services alike. It is critical to guarantee the job is right the first time. With recommended OEM supplied components and by following the maintenance schedule, your BMW is sure to continue giving you years of enjoyment on the street or track. All the filters, service kits, service manuals, fluids, and more are right here to help keep your BMW in perfect shape.

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K&N Performance Drop-In Air Filter - 3.0si, 320i 80-83, 318i 84-86, 5...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:4005
Part#: 33-2005
In Stock
$ 104.99 USD
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$ 104.99 USD
Free Shipping

K&N's drop-in air intake filter is constructed from cotton gauze material between aluminum mesh - this makes for a long lasting, high performance drop-in intake filter. These are very easy to remove and maintain. Turner Motorsport recommends this as one of the first maintenance/modifications you make to your vehicle after you purchase! 

K&N's drop in air filters allow increased airflow - dirt and particles stick to the oil on these filters, making them more effective than traditional paper filters in terms of protection. Additionally, K&N believes their filters are more efficient than paper filers - this means more oxygen getting into the engine, allowing vaporized fuel to burn more efficiently and increasing horsepower and fuel economy. The best of both worlds!

  • Covered by the K&N Million Mile Limited Warranty
  • Washable and reusable
  • Emissions legal in all 50 states
  • Will not void vehicle warranty
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Heavy Duty Performance Oil Filter
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
K&N - Corporate Logo
T#:31125647
Part#: HP-1002
In Stock
$ 17.99

This product was last offered at the strikethrough price on
01-20-2026

$ 15.99 USD
Free Shipping on orders $49 and up
$ 15.99 USD
Free Shipping on orders $49 and up