Ford Focus ST170 Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any Ford Focus ST170 air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for Ford Focus ST170 Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your Ford Focus ST170 run better. Fast and FREE SHIPPING with any Ford Focus ST170 air filter

  1. 2004 Ford Focus ST170 2.0L L4 Gas air filter
    $54.99 Regular Price $43.99 Special Price
    33-2819
    K&N
  2. 2003 Ford Focus ST170 2.0L L4 Gas air filter
    $54.99 Regular Price $43.99 Special Price
    33-2819
    K&N
  3. 2002 Ford Focus ST170 2.0L L4 Gas air filter
    $54.99 Regular Price $43.99 Special Price
    33-2819
    K&N
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