K&N High Flow Air Filter for Harley Davidson X 440 - KT-1217

K&N High-Flow Air Filter | Harley-Davidson X440 (KT-1217)

Just a quick clarification: While the KT-1217 is widely listed by retailers as the performance upgrade for the Harley-Davidson X440 (and its sibling, the Hero Mavrick 440), this part number was originally developed for the KTM Duke/Adventure 250 & 390 series. Because the X440 uses a similarly sized airbox, the KT-1217 has become the go-to "crossover" performance filter for this platform.

Key Features

• Performance for the 440cc Single: Engineered to provide up to 50% more airflow than the stock paper element. This is particularly beneficial for the X440’s long-stroke engine, helping it breathe better during mid-range acceleration and sustained highway cruising.

• Premium Filtration: Built with K&N’s signature multi-layered oiled cotton gauze media. It provides excellent engine protection by trapping 99% of contaminants while maintaining high air velocity for the fuel injection system.

   

• Washable & Reusable: A permanent "Lifetime" upgrade. You can clean, re-oil, and reinstall this filter indefinitely. It typically only requires servicing every 80,000 km (50,000 miles) depending on your riding environment.

   

• Direct Drop-In Fit: Designed to seat perfectly in the factory airbox of the X440. It is a simple "plug-and-play" installation that requires no mechanical modifications or ECU remapping for a stock bike.

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• Enhanced Exhaust Note: By reducing intake restriction, this filter often adds a slightly deeper, more purposeful intake "thump" that complements the X440's signature exhaust growl.

Technical Specifications

Why Choose K&N for your X440?

The Harley-Davidson X440 is built for torque and character. The factory paper filter is efficient but can be restrictive, especially as it begins to clog with road dust. The KT-1217 "uncorks" the intake path, providing a sharper throttle feel and ensuring your engine isn't working harder than it needs to. It’s an essential upgrade for riders looking to maximize the efficiency of their 440cc single-cylinder powerhouse.