The Classic Performance Air Filter 3In Inlet ID

The Classic Performance Air Filter 3In Inlet ID from Vibrant Performance is a universal clamp-on conical air filter element engineered for enthusiasts seeking reliable engine intake filtration without compromise. Designed for custom and modified intake systems, this filter addresses the need for flexible, bolt-on air intake solutions where OEM housings don't fit or where upgraded airflow is a priority. Whether building a performance fuel-injected engine, restoring a classic carburetor setup, or optimizing a turbocharged application, this universal filter adapts to your intake architecture while maintaining efficient particulate capture.

This filter features a conical geometry with a 3-inch flange inlet diameter, a 5.5-inch base diameter, and a 4-inch top diameter, providing a large filtration surface area and low-restriction design ideal for high-volume airflow applications. The element utilizes cotton filter media, a premium material known for superior dirt-holding capacity and extended service intervals compared to disposable fiberglass alternatives. The conical shape maximizes pleated surface area while maintaining structural integrity under boost or high-RPM operation, and the 4.25-inch height balances compact packaging with effective filtration depth—critical for engines running elevated boost pressures or demanding throttle response.

This filter element suits builders and tuners working with aftermarket intake manifolds, carbureted engine swaps, and standalone ECU-controlled platforms requiring custom plumbing. The 3-inch inlet ID accommodates most aluminum intake ducting and silicone hose sizes standard in performance shops, and the clamp-on design simplifies installation without requiring OEM air box modifications. Cotton media can be cleaned and re-oiled for multiple service cycles, reducing long-term ownership costs in high-maintenance environments. Weight of 0.97 lbs ensures minimal inertial mass in the intake tract, preserving engine response characteristics on responsive throttle-bodies or carburetors.