Race-Driven Carburetor Intake Manifold Joint Boot is a steel reinforced rubber intake manifold that replaces old worn out and cracked manifold ensuring a tight, air-leak free seal. Intake boots become dried out and cracked over time causing air leaks which lead to lean running engines that prematurely fail. Race-Driven is committed to bringing the highest quality products to all riders at an affordable price. Customer Driven ?C Quality Driven ?C Race-Driven.