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SKU: RU-4550 | UPC: 024844373809
K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height RU-4550
The K&N RU-4550 is a universal clamp-on air filter designed for racing vehicles radio-controlled cars generators snowmobiles tractors and more. It fits applications like 1999-2000 Honda Civic models 2001-2002 BMW 525i 2009 Mazda MX-5 Miata 2002 Mini Cooper S and 2004 Volkswagen Golf GTI VR6. This pre-oiled filter increases airflow for higher horsepower and acceleration while trapping contaminants with four layers of cotton gauze.
Key Features
- 4 Layers of Protection: Multiple layers of premium cotton gauze treated with a tacking agent create a mesh that blocks harmful contaminants from reaching the engine.
- Clean Once Every 5 Years: Requires cleaning only every 75000 miles under normal highway driving or 5 years at 15000 miles per year.
- Easy Installation: Pre-oiled and ready to use for quick clamp-on setup and cost-effective performance gains.
- Engineered Power: State-of-the-art media boosts horsepower acceleration and overall engine performance.
- Rugged Construction: Built with durable premium materials and vibration-absorbing rubber flanges that stretch up to 1/16 inch for secure fit.
Product Notes
- Flanges constructed from molded pliable rubber for secure attachment on 4in intakes regardless of angle or offset.
- Washable and reusable to reduce landfill waste from disposable filters.
- Product weight 1.6 lb ships in box 8.25in x 8.19in x 7.19in.
Installation Notes
- Professional installation recommended.
- Clamp-on design fits 4in flange diameter centered with 1.063in flange length no inner wire.
- Stretch flange up to 1.5mm for in-between sizes re-oil with 1.52 oz after cleaning.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2001-2002 | BMW | 525i | Base |
| 1999-2000 | Honda | Civic | CX |
| 1999-2000 | Honda | Civic | DX |
| 1999-2000 | Honda | Civic | EX |
| 1999-2000 | Honda | Civic | GX |
| 1999-2000 | Honda | Civic | HX |
| 1999-2000 | Honda | Civic | LX |
| 1999-2000 | Honda | Civic | Si |
| 1999 | Honda | Civic | Value Package |
| 2009 | Mazda | MX-5 Miata | Sport |
| 2009 | Mazda | MX-5 Miata | SV |
| 2009 | Mazda | MX-5 Miata | Touring |
| 2002 | Mini | Cooper | S |
| 2004 | Volkswagen | Golf | GTI VR6 |
Why Choose K&N?
- Proven performance in racing and street applications worldwide.
- Washable reusable design lasts a lifetime with proper care.
- 1-Year Limited Warranty covers defects in materials and workmanship.
Frequently Asked Questions
-
Q: Will the RU-4550 fit my 1999-2000 Honda Civic LX?
A: Yes it is confirmed to fit 1999-2000 Honda Civic LX and other submodels like CX DX EX GX HX Si with 4in intake. -
Q: What material is used in this filter?
A: Four layers of premium cotton gauze media treated with a tacking agent in a round tapered shape with rubber top and flanges. -
Q: What warranty applies and how do I maintain it?
A: Backed by 1-Year Limited Warranty clean every 75000 miles wash with K&N cleaner re-oil with 1.52 oz provided oil.
Shipping & Handling
- Method: Ground Shipping
- Availability: In stock - ships same or next business day
- Packaging: Protective box 8.25 in x 8.19 in x 7.19 in
- Weight: 1.6 lb
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