K&N SU-4000 High-Flow Air Filter 2000-2024 Suzuki DR-Z400 DR-Z400S DR-Z400SM

K&N SU-4000 High-Flow Air Filter

Maintaining peak performance in the dirt or on the street requires consistent, clean airflow, yet stock paper filters often restrict your engine’s potential. The K&N SU-4000 High-Flow Air Filter is the ultimate racing performance solution for riders who demand better throttle response and superior engine protection. Moto-House MX provides this high-performance upgrade to ensure your Suzuki or Kawasaki never starves for air during a grueling moto or a long-distance dual-sport trek.

Constructed from multi-layered woven cotton gauze, this filter features a pleated design that significantly increases the filtration surface area for extended service intervals. The precision-engineered application-specific sealing bead ensures an airtight, OEM replacement fit within your factory airbox, preventing dust bypass in even the most demanding conditions. Lightweight and rugged, this pre-oiled filter is made in the USA and designed to provide a lifetime of engine efficiency without the need for fuel management modifications.

Top Features: K&N SU-4000 Air Filter

• Enhanced Airflow: Engineered to increase horsepower and acceleration by reducing intake restriction.
• Pleated Cotton Media: Provides a large filtration area to maintain high airflow even when dirty.
• Washable and Reusable: Environmentally friendly design that can be cleaned and re-oiled for a lifetime of use.
• Drop-In Design: Direct fit into the OEM airbox with no cutting or modifications required.
• Pre-Oiled: Ready to install right out of the box for immediate performance gains.

Expert Pro-Tip: When cleaning your K&N filter, never use compressed air to dry it as this can damage the cotton fibers; always allow it to air dry naturally before re-oiling.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2000-2024	Suzuki	DR-Z400S
2005-2024	Suzuki	DR-Z400SM
2000-2016	Suzuki	DR-Z400 / DR-Z400E
2003	Kawasaki	KLX400R / KLX400SR

Frequently Asked Questions

Q: Is this filter compatible with all Suzuki DR-Z400 models?
A: Yes, it fits the S, SM, E, and standard models within the years specified in the fitment table.

Q: Do I need to re-jet my carburetor after installing this filter?
A: Typically, no modifications are required as it is designed to work within the parameters of the stock fuel system.

Q: How do I clean this filter?
A: Use a K&N Filter Care Service Kit to wash away dirt and re-apply the specialized filter oil.

Recommended Pairings

• NGK Iridium IX Spark Plugs
• K&N Air Filter Cleaning/Recharge Kit

Stop by our local Store Montverde, FL or lightning-fast shipping across the USA.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida.