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Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Chevy - GMC - Pickup - Small Block - Kit
Brand: Doug Thorley Headers
Mfr Part #: 364Y4
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Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which is great for towing and steep grades. To make these headers last Thorley made them (more...)
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Doug Thorley Headers
1180 W. Railroad Street St.
Corona, CA CA
Website: www.dougthorleyheaders.com
Phone: 951.739.5900
We are still a 100% American made product, which is produced at our factory in Corona, California. Our goal, as ever, is the maximizing of torque and horsepower gains and we will continue this time honored tradition as we move into the future. All of us at Doug Thorley Headers thank all of our customers for recognizing that our headers and exhaust systems, dollar for dollar, are the very best value in the industry.
Description for Doug Thorley Headers part# 364Y4
Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which is great for towing and steep grades. To make these headers last Thorley made them out of durable 14-gauge mild steel with 3/8 in. thick flanges and 5/16 in. collector rings. To prevent leaks these headers have an O-ring welded into the flange in addition to the high-temperature gasket provided.
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