Click to zoom in
SKU: RU-4450 | UPC: 024844080431
K&N Filter 2 3/4 inch Flange 5 7/8 inch OD Base 4 3/4 Top 5 inch Height
K&N RU-4450 is a universal clamp-on air filter built for racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and custom intakes with 2.75 inch flange. This round tapered filter features a 5.875 inch base OD, 4.75 inch top OD, and 5 inch height for precise fit on angled or offset intakes. It delivers increased airflow for more horsepower and acceleration while trapping contaminants with four layers of cotton gauze.
Key Features
- Four Layers of Protection: Premium cotton gauze with tacking agent forms a mesh that blocks dirt and debris for long engine life
- Low Maintenance: Wash and reuse, clean only every 75,000 miles or 5 years under highway driving
- Easy Installation: Pre-oiled and clamped on in minutes for instant performance gains without tools
- Increased Power: High-flow media raises horsepower, acceleration, and throttle response
- Durable Build: Flexible rubber flanges stretch up to 1/16 inch, absorb vibration, last a lifetime
Product Notes
- Pre-oiled and ready to install, washable with K&N cleaning kit for repeated use
- Stretches to fit in-between flange sizes, secure clamp-on attachment
- Ships in protective box, weighs 1 pound
Installation Notes
- Professional installation recommended.
- Clamp directly to 2.75 inch intake tube, no cutting or modification needed
- Compatible with rubber couplers and aluminum tubing for custom setups
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Universal | Racing Vehicles/Generators/Snowmobiles/Tractors | Custom Intakes 2.75" Flange |
| Universal | Universal | Radio-Controlled Cars/ATVs | Off-Road Equipment |
Why Choose K&N?
- Over 60 years developing high-flow filtration for motorsports and street
- Proven cotton gauze media used by millions of vehicles worldwide
- Engineered in the USA for exact flange fit and vibration resistance
Frequently Asked Questions
-
Q: What intake sizes does the RU-4450 fit?
A: Designed for 2.75 inch inside diameter flanges, stretches 1/16 inch, works on straight, angled, or offset custom air intakes -
Q: What material is used in this filter?
A: Four layers of oiled cotton gauze pleats with chrome wire backing, flexible rubber top and molded flange -
Q: What is the warranty coverage?
A: 1,000,000 Mile Limited Warranty when used and maintained as directed
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Box dimensions 7 x 7 x 7 inches
- Weight: 1 pound
Air Filters
Air filters and intake filtration parts for cars, trucks, SUVs, Jeeps, and diesel platforms are stocked at Black Ops Auto Works. Shop direct-fit filters, drop-in replacement filters, universal clamp-on filters, cabin air filters, HVAC filters, engine breather filters, pre-filters, and velocity stacks for Hellcat, Trackhawk, TRX, Grand Cherokee, Challenger, Charger, Camaro, Corvette, Mustang, F-150, Tacoma, Tundra, BMW, and Honda platforms. Every product is filterable by year, make, model, trim, engine, and filter dimension so the correct part ships the first time. Black Ops Auto Works carries 3,397 air filter SKUs across direct-fit, universal, cabin, and pre-filter categories. What This Collection Covers Air filters remove dirt, dust, and debris from air entering the engine or cabin. This collection spans OE-style direct-fit and drop-in filters, universal cone and clamp-on filters for custom intakes, cabin and HVAC filters for interior air, engine breather filters for crankcase ...
View Air Filters Products
Air Filters - Universal Fit
Universal fit air filters for cars, trucks, and SUVs across every make and platform are stocked at Black Ops Auto Works. Shop clamp on cone filters, open element filters, carbureted filters, oval filters, velocity stack filters, reusable cotton gauze filters, and dry synthetic media filters sized by flange diameter, base, top, and height for custom intakes, fabricated setups, carburetors, and universal cold air intake kits. Every product is filterable by flange size, base and top dimensions, height, media type, and brand so the correct filter ships the first time. Black Ops Auto Works carries 908 universal fit air filter SKUs across clamp on, oval, velocity stack, and carbureted categories. What This Collection Covers Universal fit air filters are not built for a specific year, make, and model. Instead they are sized by physical dimensions, flange inside diameter, base diameter, top diameter, and overall height, so they can be matched to custom intake piping, fabricated intake t...
View Air Filters - Universal Fit Products
K&N Engineering
K&N Engineering filters and intakes for Jeep, RAM, Dodge, Chevy, Ford, Toyota, BMW, and Cadillac platforms are stocked at Black Ops Auto Works. Shop cold air intakes, Aircharger and NextGen intake systems, reusable panel filters, drop-in filters, universal clamp-on filters, oil filters, cabin filters, fuel filters, and filter cleaning kits for HEMI, Cummins diesel, EcoBoost, and LS/LT engine builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 1,927 K&N Engineering SKUs across intake, filtration, and maintenance categories. What This Brand Covers K&N Engineering built its reputation on reusable, high flow air filtration. This collection spans complete cold air intake systems, direct fit replacement filters, universal clamp-on filters for custom builds, and maintenance items like oil filters, fuel filters, and cabin filters. Cold Air Intakes and Intake Systems K&am...
View K&N Engineering Products