Doug Thorley Shortie Tri-Y Headers

Doug Thorley Headers shortie tri-y headers deliver the ultimate in performance and gas mileage for your 2007-2012 Toyota Tundra. Doug Thorley Headers is the originator of the tri-y header design, which is the most efficient way to increase horsepower and torque over a broad RPM range, and more importantly the range where you use it most. That better exhaust flow produces noticable gains in horsepower and torque output, while increasing fuel efficiency.