11in X-Stream Assy 3.5in Tall Element

The K&N Engineering 11-inch X-Stream Assembly 3.5-inch Tall Element (Model 66-3120) is a high-flow air intake component engineered to replace restrictive stock air cleaners while maintaining reliable filtration. This X-Stream top-mounted assembly delivers measurable gains in engine breathing efficiency for vehicles equipped with 5-1/8-inch carburetor flanges, offering the performance-focused builder a direct path to increased airflow without sacrificing air quality management.

Built from cast aluminum and finished in durable black powder coat, the assembly features an 11-inch diameter round design with a compact 3.5-inch mounting height that fits within tight engine compartment constraints. The raised base platform provides structural rigidity and clearance for engine accessories, while the 5-1/8-inch carburetor flange ensures direct fitment compatibility with the intended vehicle platform. At 4.05 lbs, the assembly balances material robustness with weight efficiency. The X-Stream filtration media design reduces restriction compared to conventional box-style cleaners, translating to improved volumetric efficiency at wide-open throttle while the powder-coat finish resists weathering and minor impact damage common in daily driving environments.

This intake assembly is purpose-built for enthusiasts upgrading carbureted engines seeking measurable intake flow improvements without engine modifications. It's ideal for street-driven vehicles, weekend cruisers, and restoration projects where stock air cleaner systems limit performance potential. The compact height and aluminum construction work well in engine bays where conventional tall filters create clearance issues or hood clearance concerns. Builders appreciate the straightforward installation into existing carburetor mounting points and the maintenance accessibility of the raised-base design.