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Doug Thorley Headers

Doug Thorley Headers - Legendary Performance

Doug Thorley Headers Overview

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 YOUR CONTINUED SUPPORT OVER THE YEARS AND FOR RECOGNIZING THAT OUR HEADERS AND EXHAUST SYSTEMS, DOLLAR FOR DOLLAR, ARE THE VERY BEST VALUE IN THE INDUSTRY.

Hot Doug Thorley Headers Part Types

Hot Doug Thorley Headers Parts

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Dodge - Plymouth - D - W-Series Pickup - SUV - Big Block - B - RB - Pair

Brand: Doug Thorley Headers

Part#: 124Y

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 . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Dodge - Ram 1500 - 2500 - 3500 Pickup - 5.2 - 5.9L - Kit

Brand: Doug Thorley Headers

Part#: 162Y-C

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 . . . More

Doug Thorley Headers Part#: 86219

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Ford - F-250 Pickup - F-250 - F-350 Super Duty Pickup - Kit

Brand: Doug Thorley Headers

Part#: 86219

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Chevy - GMC - Car - Truck - Small Block - Pair

Brand: Doug Thorley Headers

Part#: 375Y-C

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 . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - GMC - Class A Motor Home with Oldsmobile - 400 - 425 - 455 - Pair

Brand: Doug Thorley Headers

Part#: 355Y

The best way to get rid of your exhaust. 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 . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Chevy - Camaro - Small Block - Pair

Brand: Doug Thorley Headers

Part#: 376Y1

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 . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Chevy - GMC - Silverado - Suburban - Sierra - Tahoe - Yukon - 4.8 - 5.3L - Kit

Brand: Doug Thorley Headers

Part#: 310Y-C

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 . . . More

Doug Thorley Headers Part#: 85205

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Chevy - GMC - C - K-Series Suburban - Kit

Brand: Doug Thorley Headers

Part#: 85205

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Doug Thorley Headers Part#: 85208

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Chevy - GMC - C - K-Series Suburban - Kit

Brand: Doug Thorley Headers

Part#: 85208

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Thorley Tri-Y Headers Header - Tri-Y - Steel - Ceramic Coated - Nissan - D21 Pickup - 2.4L

Brand: Doug Thorley Headers

Part#: 456Y-SC-C

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 . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Chevy - Camaro - Small Block - Pair

Brand: Doug Thorley Headers

Part#: 376Y1C

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 . . . More

Doug Thorley Headers Part#: 89202

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Toyota - Tacoma - Kit

Brand: Doug Thorley Headers

Part#: 89202

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Ford - F-250 - F-350 Pickup - 460 - Kit

Brand: Doug Thorley Headers

Part#: 214Y-FI5

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 . . . More

Doug Thorley Headers Part#: 86223

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Ford - Mercury - Explorer - Mountaineer - Kit

Brand: Doug Thorley Headers

Part#: 86223

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Doug Thorley Headers Part#: 89205

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Toyota - 4Runner - Kit

Brand: Doug Thorley Headers

Part#: 89205

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Jeep - Grand Cherokee - 5.2L - Pair

Brand: Doug Thorley Headers

Part#: 630Y-C

The best way to get rid of your exhaust. 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 . . . More

Doug Thorley Headers Part#: 89200

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Toyota - Truck - Kit

Brand: Doug Thorley Headers

Part#: 89200

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Doug Thorley Headers Part#: 85250

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Chevy - GMC - Tahoe - Yukon - Kit

Brand: Doug Thorley Headers

Part#: 85250

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Chevy - Class A Motor Home - Big Block - Kit

Brand: Doug Thorley Headers

Part#: 306Y2

The best way to get rid of your exhaust. 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 . . . More

Doug Thorley Headers Part#: 89203

Doug Thorley Jardine Cat-Back Exhaust Systems Exhaust System - Cat-Back - Aluminized Steel - Toyota - Tacoma - Kit

Brand: Doug Thorley Headers

Part#: 89203

These Doug Thorley Jardine cat-back systems are a great addition to your Doug Thorley headers. Your horsepower torque and fuel economy will increase with these 50-state smog-legal exhaust systems. They produce a powerful throaty sound outside while keeping it quiet in the cab. These cat-backs feature 16-gauge all-aluminized construction are . . . More

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