Doug Thorley THY-341-C fits the following vehicles:
- 1967-1974 Pontiac Firebird
- 1969-1974 Pontiac Grand Prix
- 1964-1973 Pontiac GTO
Doug Thorley's tradition of excellence in performance upgrades started in the 1950s and continues to this day. By combining craftsmanship with devoted attention to details, they have created high quality headers for the hot rod scene.
Your next Doug Thorley Header is available in one of the following configurations:
Tri-Y Headers: engineered to match firing sequences and minimize exhaust resistance. Maximum torque and power gains through 4500 RPMs, increased fuel economy.
Shortie Headers: designed to fit vehicles with limited space under the hood. Easy to install, specially designed to maintain emissions mounting positions for compliance with the strictest smog standards. Improves performance, enhances gas mileage.
Long Pipe Headers: popular for high performance street scene, tuned for maximum power throughout entire RPM range thanks to larger, longer primary tubes. Improve your mileage by 2-3 MPG.
All Doug Thorley Header models are constructed of 14-gauge steel for ultimate longevity. Custom designs and tunes are engineered to perform and fit flawlessly under your hood. Coated inside and out with a Ceramic-Thermal Coating that protects your header from the elements and withstands up to 1,400 degrees F, these Doug Thorley headers promote exhaust velocity and absorb up to 40% of the engine temperature to keep your engine cooler and running more efficiently.
Your Doug Thorley Header comes with O2 sensor bosses, smog equipment, and a custom gasket for 50-state legality in many applications, and a leak-free fit. Backed by a Lifetime Warranty.
