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SKU: RX-3800 | UPC: 024844038357
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
The K&N RX-3800 is a universal X-Stream clamp-on air filter for custom intake systems and racing applications with 2.438 inch flange inside diameter. This round tapered filter provides high airflow through its pleated cotton gauze media while capturing dirt and debris. The built-in top filter adds surface area for better flow rates and longer intervals between cleaning.
Key Features
- X-Stream Top Design: Pleated filter integrated into the lid increases total media area for higher airflow and extended service life
- Clamp-On Style: Molded rubber flanges create secure seal stretch up to 1/16 inch to match slight variations in flange size
- Low Restriction Flow: Deep pleats and oiled cotton gauze media allow unrestricted air intake for performance gains
- Washable Reusable Media: Clean with K&N kit and reinstall multiple times without replacement
- Vibration Resistance: Pliable flanges absorb engine vibes prevent cracking or leaks in demanding conditions
Product Notes
- Pre-oiled and ready to install out of the box
- Service every 50,000 miles in street use or 100,000 miles in competition based on conditions
- Packaged in sturdy box measuring 8.25 x 8.13 x 7.5 inches
Installation Notes
- Professional installation recommended.
- Clamp directly to 2.438 inch inside diameter flange using hose clamp not included
- Compatible with aluminum or plastic velocity stacks and intake tubes
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Custom | Clamp-On Intakes | 2.438in Flange ID |
| Universal | Racing | Off-Road Builds | Tapered Bases |
Why Choose K&N?
- Proven in racing worldwide for decades
- High-flow media engineered for dirt protection and power
- Backed by 1 million mile limited warranty on filter media
Frequently Asked Questions
-
Q: What size flange does the RX-3800 fit?
A: Designed for 2.438 inch inside diameter flanges stretches slightly for close tolerances -
Q: What material is the filter made from?
A: Four layers of oiled cotton gauze pleated for maximum surface area and filtration efficiency -
Q: What is the warranty and service process?
A: 1 million mile limited warranty use K&N cleaning kit to wash re-oil and reuse indefinitely
Shipping &. Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Manufacturer box 8.25in L x 8.13in W x 7.5in H
- Weight: 1.3 lbs
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