Bump n Run Duct Howe 24-1/4in x 18-1/2in

The Bump n Run Duct Howe 24-1/4in x 18-1/2in radiator duct from FIVESTAR is a purpose-built cooling system component designed for oval-track racing and high-performance street vehicles. This plastic radiator duct directs airflow efficiently through your core radiator, maintaining optimal engine temperatures under sustained acceleration and cornering loads. Whether you're campaigning a dirt track racer or upgrading a modified street machine, this universal-fit duct solves common cooling challenges by consolidating airflow and reducing turbulent bypass air around the radiator core.

Manufactured from durable black plastic, the Bump n Run duct measures 24.25 inches wide by 18.5 inches tall, providing coverage for standard and slightly oversized radiator cores typical in street rod and racing applications. The design forces hot air to exit through the radiator rather than recirculating around the engine bay—a critical efficiency gain in vehicles with tight engine compartments or aggressive cooling demands. At 8 pounds, the lightweight construction minimizes parasitic weight while maintaining structural rigidity during high-G cornering. The universal bolt-on design accommodates most radiator configurations, though proper fitment verification against your specific frame rails and radiator width is essential before final installation.

This radiator duct benefits mechanics and enthusiasts upgrading cooling systems on custom hot rods, circle-track competitors, and modified street performance vehicles. Installation requires basic hand tools and typically takes 30–60 minutes once you've positioned the radiator in the chassis. Verify core radiator dimensions (length and height) against the duct's 24.25 x 18.5 inch specification before purchase; oversized or undersized cores may require fabrication work or adapter brackets. The Bump n Run duct pairs effectively with higher-capacity radiators and electric fans in vehicles where factory cooling systems fall short of performance demands.