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

Starting with 3/8" thick machined flanges, these JBA Cat4Ward headers are built for serious performance on a wide range of GM trucks from 1964 to 1991. They're designed to replace restrictive factory exhaust manifolds, helping your engine breathe easier and unlock more power and efficiency. If you're working on a classic C10, a C20 Suburban, or even a Chevelle or El Camino from those years, these headers are a substantial upgrade over stock equipment.

Constructed from durable stainless steel tubing, these headers are made to handle the demands of daily driving, towing, or even track use. The key to their improved flow is the mandrel-bent tubing, which maintains a consistent diameter throughout, and JBA's proprietary Firecone collector design. This design is race-proven to maximize torque gains in the RPM range where you'll use your vehicle most. They also include factory-style emission connections, so you can retain your vehicle's emissions equipment for a cleaner, more compliant build. The extra-thick collector domes add to their robust construction.

Installation is made easier with the included high-quality hardware, aiming for a professional, no-leak seal. These headers are a significant investment in your vehicle's performance, offering a well-built solution for those looking to get the most out of their 265-400 cubic inch V8 engine.