K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H

SKU: RU-1008 | UPC: 024844373595

K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H

K&N RU-1008 is a round tapered universal clamp-on air filter built for racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and custom intakes. Its pliable rubber flange stretches up to 1/16 inch for secure fit on 4-1/2 inch diameters regardless of angle or offset. Pre-oiled cotton gauze media traps dirt while increasing airflow for more horsepower and acceleration.

Key Features

• 4 Layers of Protection: Premium cotton gauze with tacking agent forms a mesh that blocks contaminants for long engine life.
• Clean Every 5 Years: Washable design needs service only every 75,000 miles under highway conditions (5 years at 15,000 miles/year).
• Easy Installation: Pre-oiled and ready to clamp on for immediate performance gains with no cutting or modifications.
• Engineered Power: High-flow media raises horsepower, acceleration, and throttle response across RPM range.
• Rugged Construction: Durable materials and vibration-absorbing flanges built to last a lifetime.

Product Notes

• Flange stretches up to 1/16 inch (1.5mm) for in-between sizes.
• Wash and re-oil with K&N kit for repeated use.
• Product weight 1.6 lb (0.7 kg). ships in 8.25 x 8.19 x 4.81 inch box.

Installation Notes

• Professional installation recommended.
• Clamp directly to 4-1/2 inch intake tube. no adapters needed.
• Secure with hose clamp (not included) for vibration resistance.

This Part Fits

Year	Make	Model	Submodel
Universal	Custom/Racing	Generators/Tractors/Snowmobiles	All
Universal	RC Vehicles	Off-Road Equipment	All

Why Choose K&N?

• Over 50 years engineering high-flow air filters for motorsports and street.
• Lifetime washable design cuts replacement costs versus disposables.
• State-of-the-art media proven to add power in dyno tests.

Frequently Asked Questions

• Q: What intake sizes does RU-1008 fit?
  A: 4-1/2 inch flange inside diameter (114mm), base 5-7/8 inch OD (149mm), top 4-1/2 inch OD (114mm), height 8-3/8 inch (213mm).
• Q: Is the filter material washable?
  A: Yes, four layers of oiled cotton gauze rinse clean and reuse indefinitely with K&N cleaning kit.
• Q: What warranty covers this filter?
  A: 1-Year Limited Warranty against defects in materials or workmanship.

Shipping & Handling

• Method: UPS Ground or USPS Priority
• Availability: In stock – ships same or next business day
• Packaging: Secure box 8.25 x 8.19 x 4.81 inches
• Weight: 1.6 lb (0.7 kg)