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The K&N RX-4950 Universal X-Stream Clamp-On Air Filter boosts engine performance in 2011-2016 Honda CR-Z models with its innovative design featuring a pleated filter built into the top for increased air flow and filtration area. This clamp-on filter uses a 2.5 inch inside diameter flange for secure installation on custom intake setups and delivers low restriction for unrestricted power gains. Racers and daily drivers count on its durable construction and extended service intervals in demanding conditions.
Key Features
- X-Stream Top Design: Includes a pleated filter within the top that adds more media surface area for higher air flow rates and longer intervals between cleaning
- Clamp-On Flange: 2.5 inch ID molded rubber flange stretches up to 1/16 inch to fit varying sizes with vibration-absorbing pliability for secure attachment
- Low Restriction Flow: High-flow cotton gauze media pulls in more air while trapping dirt and debris to protect engines during racing or street use
- Precise Dimensions: 6 inch base OD 5 inch top OD and 5.5 inch height fit universal applications including Honda CR-Z intakes without modifications
- Washable Reusable Media: Clean with K&N service kit and reuse indefinitely reducing long-term costs compared to disposable filters
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2011-2016 | Honda | CR-Z | EX, EX-L, LX |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | RX-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 RX-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.
Related K&N Engineering Products
- Shop all K&N Engineering products
- K&N Universal X-Stream Clamp-On Filter 6in Base OD x 5in Top OD x 6.5in Height x 3in Flange ID
- K&N Filter Universal Clamp-On Filter-Round Tapered 2.75in Flange ID x 6in Base OD x 5in Top OD
- K&N Filter Universal X Stream Clamp-On 2.438in Flange ID x 4.5in Base OD x 4in Top OD x 6.563in H
Frequently Asked Questions
How do I confirm K&N RX-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 RX-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 RX-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
- Slide flange over 2.5 inch intake tube and secure with provided or standard hose clamp
- Compatible with most aftermarket cold air intake systems and stock modified setups
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