K&N High-Flow Universal Air Filter RU-3550 – Performance Boost with Reusable Design

Unlock superior airflow, increased horsepower, and long-lasting engine protection with the K&N RU-3550 Universal Clamp-On Air Filter. Built for performance enthusiasts, this washable and reusable filter delivers power and eco-conscious convenience in one rugged package.

Performance-Driven Engineering

Horsepower Boost – Advanced cotton gauze filter media is designed to improve engine performance by increasing horsepower and throttle response.
Long-Term Efficiency – Delivers up to 99% filtration efficiency without sacrificing airflow.

Multi-Layered Protection

4-Layer Filtration – Features four layers of premium cotton gauze treated with a special tackifier to trap harmful contaminants effectively.
Clamp-On Design – Engineered for a universal fit on various intake systems.

Durability & Sustainability

Heavy-Duty Build – Made using high-quality materials and advanced construction techniques for lifetime use.
Eco-Friendly & Reusable – Replace disposable filters with a washable unit that lasts up to 75,000 miles under normal highway use, reducing landfill waste.

Convenience & Compatibility

Pre-Oiled & Ready to Install – Installs quickly with minimal effort for instant performance benefits.
Universal Fitment – Ideal for various custom and stock applications.
Easy Maintenance – Clean only once every 5 years or 75,000 miles (under typical highway conditions).

Product Specifications

• Air Filter Shape: Round Tapered

• Air Filter Material: Cotton Gauze

• Washable: Yes

• Filter Re-oiling Amount: 0.61 oz (18 ml)

• Flange Type: Centered

• Flange Inside Diameter: 3.5 in (89 mm)

• Flange Length: 0.625 in (16 mm)

• Top Style / Material: Rubber / None

• Base Outside Diameter: 4.625 in (117 mm)

• Top Outside Diameter: 3.5 in (89 mm)

• Height: 5.5 in (140 mm)

• Weight: 0.8 lb (0.4 kg)

• Warranty: 1-Year Limited

• Overall Filter Efficiency: Up to 99%

• Filter Line: High-Flow

• Inner Wire: No

• Color: Red

• Product Style: Round Tapered Universal Air Filter