For over 50 years, Doug Thorley Headers has been an innovator in the automotive aftermarket. Driven by a passion for performance and superior quality, we are committed to developing 100% American-made products that will reliably deliver maximum horsepower and torque. Doug Thorley Headers has been pushing the limits of automotive technology since we first invented the Tri-Y header in 1958, and we do it all on American soil.

For more than half a century, we have operated under the principles of meticulous attention to detail and unmatched craftsmanship while our experienced staff continues to lead the way in automotive performance. 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.