For more than 60 years, Doug Thorley Headers has been an innovator in the automotive aftermarket. The company is driven by a passion for performance headers and delivering superior quality exhaust systems. Plus, it is committed to developing 100-percent American-made products that reliably deliver maximum horsepower and torque. Doug Thorley Headers has been pushing the limits of automotive technology since they first invented the Tri-Y header in 1958.

Why straddle your LS swap by running the factory exhaust manifolds or drag a set of long-tube headers on the ground with your LS swap? This 3/4-length header for 1964-67 Chevelle is designed to give you the maximum in performance while being short enough to not smack the ground like long-tube headers are known. The shorter design also makes installation easier than long tubes. They’re made from 14-gauge tubing with 3/8-inch flanges and come ceramic coated to look great and reduce under-hood temperatures.

Since every vehicle model is unique, the R&D team is constantly working to provide a diverse range of products and applications to meet customers’ needs. Whether you’re hauling an RV or building a hot rod, Doug Thorley Headers has the best performance headers to maximize horsepower and torque for your application.

Tri-Y (or 4 into 2 into 1) headers will increase the power of your engine across the widest RPM-band possible. That is the beauty of the design, and that is why they are the best street header available. PN: THY-359Y-C is designed for 1978-88 G-body cars with either a 4.8- or 6.2-liter LS swap.

The latest news we received talked about a couple of products we felt many of you would have an interest in — LS-swap headers to increase your car or truck’s performance. For starters, how about headers designed to fit multiple years of Chevy trucks, 1964-67 Chevelle, Tri-Five Chevys, 1978-88 G-bodies, and 1961-64 Impala.

Part number THY-330Y-C is perfect for that LS swap into a 1947-54 3100 Chevy pickup.

There is no arguing that headers are a great way to boost engine performance, and when you have a set of Doug Thorley Headers, you have a set of pipes to surpass your goals.