Doug Thorley Headers manufacturers some of the best performance headers and exhaust systems on the market. With over 60-years of experience, they offer unmatched customer service and some of the best technical header advice in the industry.
Founded in 1958, Doug Thorley waisted no time releasing the legendary Tri-Y headers. Arguably one of the best headers ever made, but what makes the Tri-Y header system work? The Tri-Y design utilizes the firing order of the engine which is synchronized with the header pipe. This process maximizes the scavaging effect creating optimum torque and horsepower gains over other header designs.
We talked to Mike Johnson, Sales Manager at Doug Thorley and he said, “The Doug Thorley design actually generates additional momentum for exhaust emission. This means the engine can make more power with less throttle. The Thorley Tri-Y design is specially engineered to be particularly well-suited for pickups, tow vehicles, and RV’s because the gains are tuned in to come in at the mid-range RPM highway speeds. Results include increases in fuel economy, low-end torque, and horsepower as well as reduced back-pressure and engine heat, In other words, the Thorley design actually generates additional momentum for exhaust emission. This means the engine can make more power with less throttle. The Thorley Tri-Y design is specially engineered to be particularly well-suited for pickups, tow vehicles, and RV’s because the gains are tuned in to come in at the mid-range RPM highway.”
We are so confident of the quality and performance of these designs that we ship each set with a lifetime warranty. – Mike Johnson
Doug Thorley Headers offers a wide variety of products for General Motors and other applications. Whether you are looking for headers for a tow rig, modern Camaro, or a vintage hotrod with an advanced LS engine, Doug Thorley has something for you. The company backs up all of their header and exhaust system products with a limited lifetime warranty to the original purchaser. Mike adds, “We are so confident of the quality and performance of these designs that we ship each set with a lifetime warranty.”
One of several hot products that Doug Thorley offers is their LS Swap headers. The universal swap headers are made out of 14-gauge steel tubing with the use of 3/8-inch thick flanges. After the headers are completed, they are then coated with a durable silver ceramic finish. The shortie headers offer a rear swept exit design and fit the GM LS 4.8, 5.3, 6.0, and 6.2-liter engines. The LS Swap headers have 1-5/8-inch primary tube diameter, 2-1/2-inch collectors with a 3-bolt flange design. This is a great way to free up some power and torque for your LS swap project over the factory cast manifolds. The headers will include collector reducers, header gaskets, collector gaskets, bolts, nuts, and washers.
Thorley also offers LS-swap headers for the following vehicles:
1961-’64 Chevrolet Impala
1967-’96 Chevrolet Camaro
1961-’66 Chevrolet and GMC trucks
1967-’87 Chevrolet and GMC trucks
1962-’67 Chevrolet Nova/Chevy II
1964-’67 Chevrolet Chevelle
1955-’57 Chevrolet Belair, 210, Nomad
Check out Doug Thorley for all of your LS header and exhaust system needs. With over 60-years of experience and made in the USA products, you can’t beat them for your next project. Visit www.dougthorleyheaders.com for more product information.