11in X-Stream Filter Top

The K&N 11in X-Stream Filter Top is a premium air cleaner lid designed for serious engine builders and performance enthusiasts who demand maximum airflow without sacrificing filtration integrity. This component serves as the upper housing of a high-flow air intake system, engineered to replace restrictive factory air box lids that limit volumetric efficiency and throttle response. Whether you're tuning a street machine, preparing a weekend track warrior, or optimizing a daily driver for better performance, the X-Stream Filter Top addresses the critical weak point in most stock intake systems.

K&N engineered this 11-inch filter top with a streamlined, ram-air design that increases velocity and turbulence reduction through the intake tract, allowing your engine to breathe more freely at higher RPMs. The direct-flow lid geometry minimizes sharp bends and transition losses, which translates to measurable gains in peak horsepower and mid-range torque. Constructed to withstand underhood vibration and temperature cycling, this component integrates seamlessly with K&N's modular intake systems and is specifically designed to accommodate K&N standard filter elements.

Professionals and DIY mechanics favor the X-Stream Filter Top when rebuilding intake systems on domestic and import platforms, from carbureted restorations to modern EFI conversions. Installation is straightforward and does not require engine removal, making it an accessible upgrade for a variety of applications. Whether you're enhancing a naturally aspirated engine or a moderately boosted setup, this filter top provides reliable performance enhancement without compromising reliability.