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
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  2. 2007 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  3. 2006 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  4. 2005 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  5. 2004 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  6. 2003 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  7. 2002 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  8. 2001 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  9. 2000 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
  10. 1999 Honda TRX400EX 397 air filter
    Special Price £48.69 Regular Price £64.99
    HA-4099
    K&N
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