BMW R45N Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any BMW R45N air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for BMW R45N Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your BMW R45N run better. Fast and FREE SHIPPING with any BMW R45N air filter

  1. 1985 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  2. 1984 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  3. 1983 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  4. 1982 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  5. 1981 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  6. 1980 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  7. 1979 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
  8. 1978 BMW R45N 450 air filter
    $79.99 Regular Price $63.99 Special Price
    BM-0300
    K&N
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