4in Inline Air Box

The SPECTRE 4in Inline Air Box (SPE-9832) is a precision-engineered intake component designed for automotive enthusiasts and mechanics looking to enhance engine performance. This compact inline air box replaces restrictive factory intake systems, allowing for a direct path for cooler, denser air to reach the engine's carburetor or fuel injection system. Ideal for street cars, weekend warriors, and performance builds, it offers measurable airflow advantages without requiring extensive modifications.

Constructed with SPECTRE's commitment to quality, the 4in inline air box features a streamlined internal passage that minimizes turbulence and flow restriction compared to multi-bend factory designs. Its compact footprint of 6.7 x 6.7 x 12.15 inches allows for versatile placement in the engine bay, while the 4-inch inlet diameter is compatible with common carburetor and throttle body mounting standards. Weighing just 2.925 pounds, it adds minimal weight while effectively reducing heat soak, which is crucial for maintaining optimal intake charge temperatures.

This inline air box is best suited for street performance, bracket racing, and classic car restoration projects. It caters to both bolt-on builders and dedicated engine builders aiming to optimize intake efficiency. Installation typically requires basic hand tools and a good understanding of intake systems, making it accessible for a wide range of automotive enthusiasts.