Uni-Filter NU-3425 Foam Air Filter for Harley FXST, FLST, and FXR (1989–1992)

The Uni-Filter NU-3425 foam air filter is a direct replacement designed to fit Harley-Davidson FXST, FLST, and FXR models from 1989 through 1992, ensuring a precise, factory-like fit.

Made in the USA, this high-quality foam filter delivers unsurpassed airflow for improved engine performance while maintaining robust dirt filtration to protect engine components. The foam construction provides maximum dirt-stopping capability without unduly restricting airflow, helping to preserve power and efficiency.

OEM cross-reference: 29259-89, simplifying replacement or upgrade alongside existing Harley parts.

Maintenance is straightforward: follow the online cleaning instructions to restore filtration efficiency and prolong filter life.

For even better dirt retention and easier cleaning, pair this filter with Uni Filter Air Filter Oil (sold separately).

• Material: High-quality foam for durability and effective filtration
• Fitment: Harley-Davidson FXST, FLST, FXR models 1989–1992
• Airflow: Optimized to deliver improved engine performance
• Filtration: Dirt-stopping capability to protect engine components
• Origin: Made in the USA
• OEM cross-reference: 29259-89

Uni Filter foam air filter is a direct replacement filter and is designed to fit perfectly. Filter provides unsurpassed airflow dirt stopping and overall performance.

The Uni-Filter NU-3425 foam air filter is a high-quality replacement designed specifically for Harley Davidson motorcycles, including FXST, FLST, and FXR models from 1989 to 1992. Crafted in the USA, this filter ensures a perfect fit and delivers exceptional airflow, dirt filtration, and overall engine performance. Its foam construction allows for maximum dirt stopping capability while maintaining unobstructed airflow to the engine, which enhances power output and efficiency. Proper maintenance can be easily performed by following the detailed cleaning instructions provided online, ensuring the filter's longevity and optimal performance over time. The filter's design emphasizes durability and precision, making it a reliable choice for motorcycle enthusiasts seeking to preserve their engine's health and performance. This filter is compatible with OEM cross references, specifically part number 29259-89, further simplifying replacement and upgrade processes. Pairing this filter with the Uni Filter Air Filter Oil (sold separately) can enhance dirt retention and cleaning ease, extending the lifespan and efficiency of your filtration system. Whether you are restoring a vintage Harley or maintaining a daily rider, this foam air filter offers the perfect balance of airflow, dirt protection, and durability to keep your motorcycle running smoothly. Easy to install and maintain, the Uni-Filter NU-3425 is an essential component for motorcycle enthusiasts who demand quality and reliable performance from their air filtration system.

Features:

• Material: High-quality foam construction for durability and effective filtration

• Design: Perfectly fits Harley Davidson FXST, FLST, and FXR models from 1989-1992

• Airflow: Provides unsurpassed airflow for improved engine performance

• Filtration: Excellent dirt stopping capabilities to protect engine components

• Country of Origin: Made in the USA for quality assurance

• OEM Compatibility: Cross-references with part number 29259-89

• Accessory Items: 41-0174 - Uni Filter Air Filter Oil

Fitment
Harley Davidson FLST 1989
Harley Davidson FLST 1990
Harley Davidson FLST 1991
Harley Davidson FLST 1992
Harley Davidson FLT 1989
Harley Davidson FLT 1990
Harley Davidson FLT 1991
Harley Davidson FLT 1992
Harley Davidson FXD 1991
Harley Davidson FXD 1992
Harley Davidson FXR 1989
Harley Davidson FXR 1990
Harley Davidson FXR 1991
Harley Davidson FXR 1992
Harley Davidson FXST 1989
Harley Davidson FXST 1990
Harley Davidson FXST 1991
Harley Davidson FXST 1992