Why the Tri-Y? Serious Horsepower that’s why! Invented by Doug Thorley Headers, the Tri-Y header is designed to match the synchronization of the engine firing order, thereby maximizing exhaust scavenging. This design creates the optimum torque and greatest horsepower gains in comparison to any other design.

If you're looking for some new Tri-Y headers for your classic Pony, you're in luck! Check out these Patriot Exhaust Ceramic-Coated Tri-Y Headers that are available from Doug Thorley Headers! We thank our customers, employees, suppliers, and friends for helping us serve the automotive aftermarket since 1958 as we look forward to continuing our trendsetting tradition for many years to come.