4in Inlet Cone Filter Red 3.5in Long

The 4in Inlet Cone Filter Red 3.5in Long by SPECTRE is a reusable air intake element designed for custom and universal air induction systems. This conical filter addresses the need for high-flow, washable filtration in performance applications where traditional box filters restrict airflow or fail to meet aesthetic requirements. Built for automotive enthusiasts and mechanics seeking reliable engine protection without sacrificing intake velocity, this filter serves as a direct replacement or upgrade component in open-element air systems.

Constructed from premium reusable cotton media, the 4in inlet cone filter features a clamp-on design that secures to 3 to 4 inch flanges, making installation straightforward across diverse platform configurations. The conical geometry—with a 6 inch base diameter tapering to 4.75 inches at the top and standing 2.625 inches tall—optimizes surface area for improved dirt capacity while maintaining minimal restriction. Cotton filtration media offers superior breathability compared to paper elements, allowing engines to draw cooler, oxygen-rich air while remaining washable and reusable for hundreds of service cycles, reducing long-term maintenance costs.

This filter excels in applications ranging from street-driven vehicles with custom intake manifolds to carbureted engine builds and forced induction setups where maximum flow efficiency matters. The red cotton finish provides visual appeal while the universal mounting compatibility allows fitment across multiple vehicle platforms using standard hose clamps. Maintenance involves periodic cleaning with soap and water or specialized filter cleaner; the durable cotton construction withstands repeated washing without degradation, making it an economical solution for builders prioritizing both performance and durability.