K&N KA-2508 High-Flow Air Filter for 2008-2012 Kawasaki Ninja 250R / 2013-2017

Vehicle Fitment

• 2008-2012 Kawasaki EX250R Ninja 250R (250 cc) - all trims / variants
• 2013-2017 Kawasaki EX300 Ninja 300 / Ninja 300 ABS (296 cc) - all trims / variants

Fitment Notes

• Direct OEM-airbox replacement - no airbox modification required for listed models.
• Pre-oiled, washable & reusable cotton-gauze panel filter; installs using the stock airbox sealing bead for proper fitment.
• No fuel-management or jetting changes needed when used on standard, stock engine setups.

Features

• Pleated cotton gauze media provides increased airflow and improved engine breathing vs. stock filter.
• Large filtration surface area offers long service intervals before cleaning is needed.
• Multi-layer woven cotton gauze for reliable dust and debris filtration - protecting the engine under varied riding conditions.
• Washable and reusable design - reduces recurring replacement costs and landfill waste compared to disposable filters.
• Comes pre-oiled and ready to install right out of the box.
• Application-specific base seal and sealing bead ensure a secure, leak-free fit in OEM airbox.
• Improved throttle response and potential for more consistent engine performance under acceleration and load due to better airflow dynamics.
• Durable construction built for long-term use - designed to last the life of the motorcycle with regular maintenance.

Specifications

• Filter Shape: Panel air filter
• Filter Material: Multi-layer cotton gauze
• Outside Length: 8.25 in (≈ 210 mm)
• Outside Width: 5.375 in (≈ 137 mm)
• Height (Thickness): 0.625 in (≈ 16 mm)
• Washable & Re-oilable: Yes
• Filter Re-Oiling Amount (after cleaning): ~0.44 oz (≈ 13 ml)
• Package Contents: 1 x air filter element + 1 x sealing grease

Included Components

• 1x K&N KA-2508 High-Flow Air Filter
• 1x 1 oz Sealing Grease (for airbox lip seal)

Product Description

The K&N KA-2508 is a high-flow, reusable replacement air filter engineered specifically for the popular lightweight sport-motorcycles from Kawasaki - namely the Ninja 250R (2008-2012) and Ninja 300 (2013-2017). Its pleated cotton-gauze media significantly increases intake airflow compared to standard paper filters, allowing the engine to breathe more freely for improved throttle response and smoother power delivery - especially under acceleration or varied riding conditions. The large filtration surface and multi-layer cotton design ensure effective dust and debris trapping, offering long intervals between cleans while still safeguarding engine longevity.

Installation is straightforward: KA-2508 installs directly into the stock airbox using the OEM sealing bead, with no modifications or tuning required for stock engines. It comes pre-oiled and ready for immediate use. Because it is washable and reusable, this filter offers long-term value and reduced maintenance cost compared to disposable stock filters. KA-2508 represents a reliable performance upgrade for Ninja 250R and Ninja 300 owners seeking enhanced engine breathing, consistent protection, and long filter life.