Tri-Y Headers with Silver Ceramic Coating

The Doug Thorley THY-364Y-C headers are a performance upgrade for your vehicle's exhaust system, designed to increase power across the widest RPM band possible. Built with over 50 years of experience, these Tri-Y (4 into 2 into 1) style headers are considered the best street header available. Constructed from industry-leading 14-gauge mild steel tubing and featuring 3/8" thick flanges, these headers are built for longevity. They are finished with a silver ceramic coating, which not only adds a sleek look but also significantly reduces under-hood temperatures and provides environmental protection. The primary tube diameter is 1-5/8", with a 2-1/2" collector diameter, and they utilize a 3-bolt flange collector attachment. Bolts and gaskets are included. However, if your vehicle has aftermarket components or has been modified, it is the installer's responsibility to verify fitment. The THY-364Y-C headers are specifically designed for 1973-1987 GM 1/2-ton pickup trucks and 1973-1991 GM 3/4-ton and 1-ton pickup trucks equipped with 265-400 cubic inch engines and 4WD.