JBA 65-86 GM Truck 265-400 Carbureted w/A.I.R. 1-5/8in Primary Raw 409SS Cat4Ward Header

Starting with 3/8-inch thick machined flanges, these JBA Cat4Ward headers are built for serious performance on your GM truck. They're designed to replace the restrictive stock exhaust manifolds, which can really choke up an engine, especially those 265 to 400 cubic inch V8s. By opening up the exhaust flow, you can expect a noticeable increase in both horsepower and torque, making your truck feel much more responsive, whether you're towing, daily driving, or just enjoying the open road.

These headers are constructed from durable 409 stainless steel tubing, which holds up well to the heat and stress of regular use. JBA uses a proprietary Firecone collector design, which they say is proven to maximize power gains in the RPM range you'll use most often. The tubing is mandrel-bent to maintain consistent diameter throughout, ensuring smooth exhaust gas flow. They also include factory-style emission connections, which is important for keeping your emissions equipment functional, and come with the necessary hardware for a solid, leak-free installation.

This header set is designed to fit a wide range of GM trucks from the mid-60s through the mid-80s, including popular models like the Chevrolet C10 Pickup and El Camino. They are specifically made for carbureted engines that came equipped with A.I.R. (Air Injection Reactor) systems. If you're looking to get more out of your engine and improve its breathing, these JBA headers are a well-built option.