These Doug Thorley headers are the perfectto complete your LS motor swap into your Camaro or Nova. The headers are designed to outflow your stock exhaust manifolds by leaps and bounds. These headers will giveyour engine more horsepower and torque across the entire RPM range. To make these headers last, we made them out of industry leading 14-gauge mild steel tubing with 3/8″ thick flanges. Topping all of that off, all of our headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect the headers from the environment.All of this 100% American made, and backed by our lifetime warranty of course!