This universal collector set includes two collectors, two flanges, and two gaskets, making it a complete solution for building or repairing dual exhaust systems. Each collector features a 3 inch inlet and a 2.5 inch outlet, allowing you to step down from header size to standard exhaust tubing for easy system integration. Built from durable steel for welding and fabrication, these collectors help improve exhaust scavenging and overall efficiency. Ideal for custom exhaust builds, performance upgrades, hot rods, muscle cars, and race applications. Please verify sizing and fitment before purchasing to ensure proper compatibility with your headers and exhaust layout.