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K&N RU-4950 is a universal clamp-on air filter engineered for racing vehicles generators snowmobiles tractors and more with a 2.5 inch centered rubber flange 6 inch base 5 inch top and 5.5 inch height. It fits 2007-2009 Ford Focus models and 2009-2012 Mitsubishi Lancer variants via clamp-on installation. Pre-oiled cotton gauze media increases airflow for added horsepower acceleration and engine performance while trapping dirt.
Key Features
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2007-2009 | Ford | Focus | S, SE, SEL, SES |
| 2009-2012 | Mitsubishi | Lancer | DE, ES, ES Sportback, Evolution GSR, Evolution MR Touring, Evolution SE, GT, GT Sportback, additional manufacturer-listed applications |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | RU-4950 |
| Product Type | Air Filters - Universal Fit |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new K&N air filters - universal fit identified by manufacturer part number RU-4950. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.
About K&N Engineering
K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.
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Frequently Asked Questions
How do I confirm K&N RU-4950 fits my vehicle?
Match the year, make, and model in the fitment table, then confirm the engine, factory housing, sensor layout, emissions notes, and any application restrictions stated for this exact part.
Is K&N RU-4950 washable and reusable?
Serviceability depends on the exact media used for this part number. Follow the K&N cleaning and oiling directions for this filter and never apply oil to media specified as dry.
What should be checked after installing K&N RU-4950?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.
Installation Instructions
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