SKU: SU-4000 | UPC: 024844080622
K&N SU-4000 Replacement Air Filter for 2000-2019 Suzuki DR-Z400 and 2003 Kawasaki KLX400
The K&N SU-4000 is a direct replacement air filter for Suzuki DR-Z400 series motorcycles from 2000 to 2019 and 2003 Kawasaki KLX400 models. This washable reusable filter installs into the OEM airbox and delivers high airflow with excellent filtration for clean carburetion in dirty dusty off-road conditions and at high altitudes. It boosts horsepower and acceleration without jet changes or fuel modifications.
Key Features
- High Airflow Design: Pleated cotton media creates large filtration area for low restriction high capacity and extended service intervals
- Excellent Filtration: Multiple layers of woven cotton gauze capture dirt and dust while allowing maximum air intake
- Direct OEM Fit: Application specific sealing bead ensures precise installation into factory airbox with no modifications
- Washable Reusable: Clean service and re-oil for repeated use most come pre-oiled and ready to ride
- Performance Gains: Increases horsepower and acceleration specifically for off-road motocross ATVs UTVs and side-by-sides
Product Notes
- No fuel management or jetting changes needed for performance improvements
- One Year Limited Warranty covers defects in materials and workmanship
- Product weight 0.55 lb (0.25 kg) package dimensions 7.5 x 7.5 x 1.75 in (191 x 191 x 44 mm)
Installation Notes
- Professional installation recommended.
- Drops directly into OEM airbox remove stock filter and install with no tools beyond basic access
- Compatible with factory hardware no additional mounting parts required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003 | Kawasaki | KLX400R | Base |
| 2003 | Kawasaki | KLX400S | Base |
| 2000-2004 | Suzuki | DR-Z400 | Base |
| 2000-2007 | Suzuki | DR-Z400E | Base |
| 2000-2019 | Suzuki | DR-Z400S | Base |
| 2005-2010 | Suzuki | DR-Z400SM | Base |
| 2013-2019 | Suzuki | DR-Z400SM | Base |
Why Choose K&N?
- Over 60 years engineering air filters for powersports and automotive
- Cotton gauze media proven for high flow and dirt holding capacity
- Designed tested for precise fit and real world off-road durability
Frequently Asked Questions
- Q: Will the SU-4000 fit my 2010 Suzuki DR-Z400S?
A: Yes it fits all 2000-2019 Suzuki DR-Z400S models directly into the OEM airbox - Q: What material is used in this filter?
A: Multiple layers of pleated woven cotton gauze for high airflow and superior dust capture washable with K&N cleaning kit - Q: What is the warranty and service interval?
A: Backed by One Year Limited Warranty service every 50,000 miles or annually depending on riding conditions
Shipping & Handling
- Method: Standard ground shipping
- Availability: In stock – ships same or next business day
- Packaging: Compact box 7.5 x 7.5 x 1.75 in protective foam insert
- Weight: 0.55 lb
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