The K&N ATV Air Filter HA-4099 for Honda TRX 400EX / Sporttrax 400 consists of cotton, with about 40% more air flow, The K&N race filter as much as 60% more compared to a original air filter a Honda TRX 400EX / Sporttrax 400. The K&N ATV air filter HA-4099 is thinly coated with a special oil to achieve an optimum filtering effect and to grant long service intervals for Honda TRX 400EX / Sporttrax 400.
By using a K&N air filter the output of Honda TRX 400EX / Sporttrax 400 and increased fuel consumption can be reduced.