K&N Engineering SU-4000 Off-Road Replacement Air Filter for Suzuki DR-Z400 and Kawasaki KLX400R

K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration. K&N Replacement Air Filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. K&N air filters are washable and reusable and provide high air-flow with excellent filtration.

• Designed to provide increased horsepower and acceleration specifically developed for Off-Road, Motocross, ATVs, UTVs and Side by Sides
• Fits directly into OEM air box with application specific sealing bead ensuring a precise fit
• Pleated media provides a large filtration area offering long service intervals
• No fuel management modifications are required to obtain increased performance
• Multiple layers of woven cotton gauze media offers excellent filtration
• Washable & reusable, most are pre-oiled and ready to ride
• One Year Limited Warranty

The K&N SU-4000 replacement air filter is specifically designed for off-road riding applications, providing optimal performance in dusty environments and at high altitudes. Made by K&N Engineering, this washable and reusable filter ensures clean carburetion, maintaining engine efficiency during extended off-road adventures. Its high-flow pleated media offers a large filtration surface, allowing for longer service intervals without sacrificing filtration quality. The filter fits directly into the OEM air box with an application-specific sealing bead, ensuring a precise and secure fit that prevents unfiltered air from entering the engine.

Constructed with multiple layers of woven cotton gauze media, the SU-4000 offers excellent filtration capabilities while supporting increased horsepower and acceleration. It requires no modifications to fuel management systems, making installation straightforward for riders seeking performance improvements. Designed for durability, this filter is pre-oiled and ready to install, providing convenience and reliability for riders of Suzuki DR-Z400 models from 2000 to 2003 and Kawasaki KLX400R from 2002. The product includes a one-year limited warranty, underscoring its quality and longevity.

Ideal for riders who demand consistent performance in challenging off-road conditions, the K&N SU-4000 ensures your motorcycle remains well-protected and performing at its best. Regular cleaning and re-oiling maintain optimal airflow and filtration, extending the service life of the filter and preserving engine health. Whether you're tackling dirt trails or participating in motocross events, this filter offers a dependable solution for high-performance off-road riding.

Features:

• Designed to provide increased horsepower and acceleration for off-road, motocross, ATVs, UTVs, and Side by Sides

• Fits directly into OEM air box with application-specific sealing bead for a precise fit

• Pleated media provides a large filtration area for long service intervals

• No fuel management modifications required to achieve increased performance

• Multiple layers of woven cotton gauze media for excellent filtration

• Washable and reusable, pre-oiled and ready to install

• Includes a one-year limited warranty