K&N 66-3320R X-Stream Drag Racing Air Filter Assembly

Application Fitment

• Universal / custom intake applications - designed for drag-race or performance engines with ~7.313 in (186 mm) carburetor/throttle-body flange

Features

• Large-diameter round cotton-gauze filter media for maximum airflow and filtration efficiency
• "X-Stream" top assembly - designed for high-volume air delivery, ideal for drag-race or high-RPM builds
• Washable and reusable filter element - reduces long-term maintenance cost vs disposable filters
• Pre-oiled and ready for installation out of the box
• Large filter volume and surface area to support high-power engines and sustained high-RPM use
• Base-mount design - fits many drag-race scoop / carburetor configurations with matching flange size
• Includes mounting flange / base for direct mount to carburetor / throttle body (where compatible)
• Enhanced airflow aids better engine breathing - potential for improved throttle response, peak power, and engine sound under heavy load / high RPM

Specifications

• Filter shape: Round "Dominator" style with X-Stream top
• Outside diameter: 9.0 in (229 mm)
• Filter height: 5.0 in (127 mm)
• Neck / flange inside diameter: 7.313 in (186 mm)
• Overall height (assembled): approx. 6.25 in (159 mm)
• Filter media: Multi-layer cotton-gauze, washable and reusable
• Weight: approx. 2 lb (0.9 kg)
• Mounting style: Base-mount / flange mount - clamps or hold-down hardware as required for your setup
• Replacement filter: 28-4240 (when servicing element) per manufacturer specification
• Warranty: 1-Year limited (per racing-/non-street part norms) - part of K&N's Racing / Competition line

Included Components

• 1x Round Cotton-Gauze Air Filter Element (pre-oiled)
• 1x X-Stream Top Assembly / Air-flow Top
• 1x Base / Flange Mount for carburetor/throttle-body (7.313 in flange ID)
• Mounting hardware required for flange installation (as applicable)

Product Description

The K&N 66-3320R X-Stream Drag Racing Air Filter Assembly is a universal, high-flow air filter built for performance engines - especially suited for drag racing, hot rods, or custom builds that use carburetor or throttle-body intake setups with a ~7.313 inch flange. With a large 9-inch diameter, 5-inch tall cotton-gauze filter element and a high-flow X-Stream top, this assembly allows engines to draw maximum amounts of air, improving volumetric efficiency under high-RPM or high-load conditions. The result can be sharper throttle response, improved top-end power delivery, and a more aggressive intake sound - ideal when you need unrestricted airflow for maximum engine performance.

Because the filter is washable and reusable, the 66-3320R offers long-term value compared to disposable filters - as long as it's cleaned and re-oiled properly. The base-mount flange design allows it to bolt directly onto many carburetors or throttle bodies (with matching flange ID), simplifying installation for custom or racing-oriented intake setups. Note: this is not a vehicle-specific, emissions-legal part - it's intended for competition or non-emissions-restricted use. If you're building a drag-car, hot-rod, or other high-performance engine project needing a reliable, large-volume air filter - 66-3320R is a proven, widely used choice among racers and enthusiasts.