4in Inlet Cone Filter 8.75 in Long

The SPECTRE 4in Inlet Cone Filter 8.75 in Long is a universal reusable air intake component designed for enthusiasts seeking improved engine breathing and long-term cost savings. Whether you're building a custom intake manifold, upgrading a classic engine bay, or fine-tuning a modified vehicle, this cone filter accepts a standard 4-inch diameter intake tube and delivers clean air to your carburetor or throttle body. Unlike disposable paper filters, a quality cone filter like this SPECTRE unit pays for itself through multiple cleaning cycles and superior airflow characteristics over the life of your build.

This filter's 8.75-inch length provides optimal surface area for dust capture while maintaining minimal restriction—critical for naturally aspirated and modified engines where every cubic foot per minute of air matters. The conical geometry increases filter media exposure compared to cylindrical designs, allowing longer service intervals between cleanings and reducing backpressure that would otherwise rob your engine of power. Weighing just 2.05 pounds and measuring 6.3 x 6.3 x 10.8 inches overall, the compact footprint fits tight engine compartments common in street rods, vintage restorations, and performance swaps where space is at a premium.

Mechanics and engine builders favor SPECTRE cone filters for custom intake applications where OEM airboxes are removed or incompatible with modified heads and manifolds. Installation requires only a 4-inch diameter intake tube—whether rubber, aluminum, or fiberglass—secured with standard hose clamps; no special brackets or adapters needed. This universal design works across street machines, hot rods, custom motorcycles, and marine engines, making it a go-to choice for any builder valuing reliable airflow, washable media, and cost-effective performance without proprietary fitments.