K&N RU-3550 High-Flow Original Universal Air Filter – 3.5" Flange Reusable Washable Performance Engine Intake Filter – Up to 99% Filtration

Product Description :

K&N RU-3550 High-Flow Original Universal Air Filter

Upgrade your vehicle's air intake system with the K&N RU-3550 High-Flow Universal Air Filter, engineered to deliver increased horsepower, improved throttle response, and exceptional engine protection. Designed with premium multi-layer oiled cotton gauze, this reusable performance air filter provides superior airflow while capturing harmful contaminants with up to 99% filtration efficiency.

Unlike disposable paper filters, the K&N RU-3550 is washable and reusable, helping reduce maintenance costs and environmental waste. Under normal highway driving conditions, it requires cleaning only every 75,000 miles, making it one of the most durable and cost-effective performance upgrades available.

Featuring a 3.5-inch (89 mm) centered flange, tapered round design, and premium rubber construction, the RU-3550 fits a wide variety of custom air intake systems, cold air intakes, racing applications, off-road vehicles, and performance builds.

Whether you're upgrading a street car, truck, SUV, or custom project vehicle, the K&N RU-3550 delivers the airflow your engine needs without sacrificing filtration.

Key Features :

• Genuine K&N RU-3550 Universal High-Flow Air Filter

• Increases horsepower and engine acceleration

• Improves airflow for enhanced engine performance

• Premium 4-layer oiled cotton gauze filtration media

• Up to 99% filtration efficiency

• Washable and reusable lifetime air filter

• Requires cleaning only every 75,000 miles under normal conditions

• Durable rubber flange construction

• Easy installation with pre-oiled design

• Fits custom intake systems with 3.5-inch flange

• Helps reduce disposable filter waste

• Ideal for cars, trucks, SUVs, race cars and off-road vehicles

Product Features :

• High-flow reusable engine air filter

• Universal performance air filter

• 3.5-inch flange air filter

• Washable cotton gauze filter

• High airflow intake filter

• Cold air intake replacement filter

• Performance engine intake filter

• Up to 99% filtration efficiency

• Reusable automotive air filter

• Racing air intake filter

• Off-road air filter

• Long-life washable filter

• Increased horsepower filter

• Improved throttle response

• Premium engine protection