Doug Thorley Headers manufactures legendary performance headers and exhaust systems with visionary designs, while providing excellent customer service and performance headers technical advice. 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.