2003 Honda TRX400EX 397 Air Filter

2003 Honda TRX400EX 397 Air Filter
  • Designed to increase horsepower & torque for the 2003 Honda TRX400EX with the 397 engine.
  • Washable & Reusable
  • This K&N TRX400EX air filter lasts the lifetime of your vehicle.
  • Million Mile Limited Warranty with use on Street Vehicles
K&N engine air filters for the 2003 Honda TRX400EX are designed to add power and performance by providing up to 50% more air flow to your Honda’s engine.

Your 2003 Honda TRX400EX deserves a K&N! Select the Product Info button below to see everything the air filter fits.

VehicleProduct  
2003 Honda TRX400EX 397 - All Models
ATV
Love it! Really gives my quad some good pep. I can feel the power thru the entire power band. Why did I wait so long?
Brian Houston, Lehi, Utah
Replacement Air Filter
K&N HA-4099
  • Designed to Increase Power and Acceleration
  • Washable and Reusable
HA-4099 2003 Honda TRX400EX 397 Replacement Air Filter
List Price: $84.69
Your Price: USD $62.99
In stock
2003 Honda TRX400EX 397 - All Models
ATV
Powerlid Airbox Cover
K&N HA-4099-T
  • Replaces Air box Lid
  • Washable and Reusable
HA-4099-T 2003 Honda TRX400EX 397 Powerlid Airbox Cover
List Price: $171.39
Your Price: USD $110.99
In stock