Conical Air Filter 6in Flange

The Conical Air Filter 6in Flange from SPECTRE is engineered for engine builders and performance enthusiasts who demand improved airflow without sacrificing engine protection. This high-flow intake component is designed to replace restrictive OEM air filters, making it an essential upgrade for naturally aspirated and modified engines seeking maximum volumetric efficiency. Whether you're tuning a street machine, preparing for competition, or simply optimizing daily-driver performance, the 6-inch flange diameter accommodates a wide range of intake manifold configurations and aftermarket intake systems.

The conical design significantly increases effective filter media surface area compared to traditional cylindrical filters, which directly translates to lower restriction and sustained airflow under high-demand conditions. SPECTRE's construction utilizes premium pleated filter media that traps contaminants while minimizing pressure drop across the intake tract—a critical factor in maintaining accurate air-fuel ratios and preventing unnecessary load on your fuel management system. The 6-inch flange provides secure, repeatable sealing against standard intake manifold ports, ensuring no unmetered air bypasses the filtration stage, which is paramount for carbureted engines and EFI systems alike.

Mechanics and engine builders typically pair this conical filter with custom intake plenums, velocity stacks, or factory ram-air systems to exploit its superior flow characteristics across the entire RPM band. Installation is straightforward for most applications—simply secure the 6-inch flange to your intake opening with a hose clamp or adapter ring, then connect your intake tube. The compact footprint (8.5 x 8 x 9 inches) allows integration into tight engine bays, making it ideal for restomod projects, vintage race cars, and modern performance builds where space constraints rule out larger filter housings.