K&N High-Flow Engine Air Filter for Kawasaki Ninja 400 – Boost Performance & Longevity

Engineered for riders who demand peak performance and long-lasting reliability, the K&N High-Flow Air Filter for Kawasaki Ninja 400 ensures optimal airflow, improved engine output, and a lifetime of service.

Performance Enhancement

• Increased Horsepower & Torque – Designed to enhance acceleration and throttle response.

• Optimized Airflow – High-flow pleated design delivers maximum airflow to the engine.

• Precision Fit – Application-specific base seal and sealing bead for a perfect factory airbox fit.

Durable Filtration Technology

• Advanced Multi-Layer Cotton Gauze – Multiple layers of oiled cotton media offer excellent filtration efficiency.

• Extended Service Intervals – Large surface area supports long service life between cleanings.

• Washable & Reusable – Pre-oiled and ready to install, with easy maintenance for lifetime use.

Proven Reliability

• Made in the USA – Manufactured with trusted American engineering for over 40 years.

• Lifetime Limited Warranty – Backed by K&N’s No-Hassle Lifetime Warranty for peace of mind.

• FAQs

  Q1. Is this air filter compatible with all Ninja 400 models?
  Yes, the KA-4018 is specifically designed to fit all standard Kawasaki Ninja 400 models.

  Q2. How often does the filter need cleaning?
  Under normal conditions, cleaning is only required every 50,000 miles.

  Q3. Can I install this myself?
  Absolutely! The KA-4018 fits directly into the factory airbox and requires no modifications.

  Q4. Is the filter suitable for street and performance riding?
  Yes, it is engineered for both everyday riding and performance-focused applications.

  Q5. Is it really lifetime usable?
  Yes, with proper cleaning and oiling, this filter can last the lifetime of your motorcycle.