Product Details
4-2-1 Steel Tri-Y Exhaust Headers with Adapters (THY-323Y-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.875". Collector Outlet Diameter: 3". Header Coating: Silver Ceramic. What better way to enhance your vehicle than a beautiful set of long tube tri-y headers that will ensure you're getting the most power possible out of your LS motor! Backed by over 50 years of knowledge and experience, Doug's headers are designed to outflow stock exhaust manifolds by leaps and bounds. Tri-Y (or 4 into 2 into 1) style headers by design will increase the power of your motor across the widest RPM band possible. That is the beauty of the design, and that is why they are the best street header available. To make these headers last, Doug's built them using industry leading 14-gauge steel tubing with 3/8" thick flanges. Topping all of that off, Doug's headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect the headers from the environment. All 100% American made, and backed by Doug's lifetime warranty. Install these long tube headers today and feel your vehicle's true power potential! Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is the beauty of the design, and that is why they are the best street header available.
Specifications
| Style: 4-2-1 |
| Header Material: Steel |
| Primary Diameter: 1.875" |
| Collector Diameter: 3" |
| Weld Up: Yes, adapters must be welded to exhaust system |
| Primary Tube Diameter: 1-7/8" |
| Primary Tube Gauge: 14 Gauge |
| Collector Attachment: 3 Bolt Flange |
| Tuned: No |
| Flange Thickness: 3/8" |
| Bolts and/or Studs Included: Yes |
| Gaskets Included: Yes |
| Adapters/Reducers Included: Yes |
| Y-Pipe (Crossover) Included: No |
| Motor Mounts Included: No |
| Quantity: Sold as a Pair |
| Warranty: Limited Lifetime to original purchaser |
Features
- Driven by a passion for performance and superior quality
- Designed to maximize horsepower and torque of your vehicle
- Made with meticulous attention to detail and unmatched craftsmanship
Doug's Long Tube Headers replace restrictive stock exhaust manifolds with long primary tubes designed to dramatically increase the flow of exhaust gasses, and reduce power robbing back pressure within the exhaust system. Allowing the engine to breathe more freely improves power and efficiency, making Doug's Long Tube Headers one of the most cost-effective modifications you can make to your vehicle.
The Long Tube Header is perfect for any high performance street or strip application. Each header is constructed from thick wall steel, and all come finished with Doug's beautiful ceramic coating for long-lasting performance.
For over 50 years, Doug Thorley Headers has been an innovator in the automotive aftermarket. Driven by a passion for performance and superior quality, they are committed to developing 100% American-made products that will 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, and they do it all on American soil.