Universal Air Filter 6in FLG 7-1/2inB 4-1/2inT

The K and N Engineering Universal Air Filter 6in FLG 7-1/2inB 4-1/2inT is a versatile intake component designed for builders and mechanics seeking straightforward airflow improvement across diverse engine configurations. This universal-fit unit addresses a common challenge: stock air restrictors limit volumetric efficiency and throttle response, particularly in modified or custom-built applications where factory intake paths don't align with performance goals.

Built with K and N's signature high-flow cotton gauze media and oil-impregnated construction, the Universal Air Filter maintains excellent filtration efficiency while dramatically reducing intake restriction. The 6-inch flange diameter provides a solid seal at the carburetor or throttle body, while the 7-1/2-inch base and 4-1/2-inch top dimensions accommodate the filter's tapered geometry—a design that maximizes surface area for lower pressure drop and extended service intervals compared to stock paper filters.

This reusable filter design means you'll clean and re-oil it periodically rather than replace it, reducing long-term costs and waste. Its compact size of 8.5 x 8.5 x 8.7 inches makes it suitable for tight engine bays without compromising filtration capacity. Whether you're running a naturally aspirated street engine or a vintage rebuild, this filter bridges the gap between OEM limitations and real-world performance demands.