Best performance headers made in America. For questions on our top performer headers like the TRI-Y contact us at [email protected] Toll: (800) 347-8664 Doug Thorley Headers 1280 Graphite Dr. Corona, CA 92881
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.










