Honda TRX400EX Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any Honda TRX400EX air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for Honda TRX400EX Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your Honda TRX400EX run better. Fast and FREE SHIPPING with any Honda TRX400EX air filter

  1. 2008 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  2. 2007 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  3. 2006 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  4. 2005 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  5. 2004 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  6. 2003 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  7. 2002 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  8. 2001 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  9. 2000 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
  10. 1999 Honda TRX400EX 397 air filter
    $79.99 Regular Price $63.99 Special Price
    HA-4099
    K&N
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