The K&N High-Flow Original Universal Air Filter (RU-3550) is engineered to boost horsepower and acceleration with its advanced cotton gauze media, offering up to 99% filtration efficiency, rugged construction, and easy installation, while being washable, reusable, and backed by a 1-Year Limited Warranty for long-lasting performance and universal fitment across a variety of applications.
K
ey Features:
- Engineered Power: Increases horsepower and acceleration for improved engine performance.
- 4 Layers of Protection: Multi-layered cotton gauze media traps harmful contaminants while maintaining airflow.
- Durable Construction: Built with premium materials for lasting performance.
- Washable & Reusable: Cleanable every 75,000 miles (under normal highway conditions) for long-term use.
- Easy Installation: Pre-oiled and ready to install for quick performance upgrades.
- Universal Fit: Compatible with a wide range of vehicles and applications.
- Eco-Friendly: Reduces waste by eliminating the need for disposable filters.
- 1-Year Limited Warranty: For peace of mind and dependable performance.
Specifications:
- Air Filter Shape: Round Tapered
- Material: Cotton Gauze
- Flange Type: Centered
- Flange Inside Diameter: 3.5 in (89 mm)
- Height: 5.5 in (140 mm)
- Base Outside Diameter: 4.625 in (117 mm)
- Weight: 0.8 lb (0.4 kg)
- Filter Re-Oiling Amount: 0.61 oz (18 ml)
- Efficiency: Up to 99% Filtration
- Color: Red
- Product Style: High-Flow Universal Air Filter
Upgrade your vehicle’s performance with the K&N High-Flow Universal Air Filter (RU-3550) for superior airflow, filtration, and long-term engine protection.












































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