Doug Thorley Headers THY-352Y-L-C Silverado/Sierra Tri-Y 2014-2019

Doug Thorley Headers THY-352Y-L-C Are you tired of dragging your long tube headers on the ground every time your lowered car hits a bump?

If so, then these headers are for you! Just a little shorter than true long tube headers, we designed these to give you the maximum in performance while keeping them short enough to not smack the ground when the road gets a little bumpy.

Of course, the shorter design makes for a bit easier of an install than long tubes also, you definitely don't need to be lowered to run these.

To make these headers last, we made them out of industry leading 14-gauge tubing with 3/8" thick flanges.

Topping all of that off, all of our headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect them from the environment. 

All of this 100% American made, and backed by our lifetime warranty of course!

Unless otherwise noted, these headers are designed to fit the vehicle as it came from the manufacturer.

This includes components like cylinder heads, chassis, steering, motor mounts, body mounts and bushings, etc.

If your vehicle is using aftermarket components, parts from other applications, or custom altered parts, then it is the installer's responsibility to verify fitment.

Brand: Doug Thorley Headers

Manufacturer's Part Number: THY-347-C

Part Type: Headers

Product Line: Doug Thorley Headers

Header Style: 4:2:1 Long-Tube Tri-Y Header 

Material: Steel

Finish: Silver Ceramic Coated

Weld Up: No

Primary Tube Diameter: 1-3/4"

Primary Tube Gauge: 14 Gauge

Collector Attachment: 3 Bolt Flange

Collector Diameter: 2-1/2"

Tuned: No

Flange Thickness: 3/8"

Bolts and/or Studs Included: Yes

Gaskets Included: Yes

Reducers Included: N/A

Y-Pipe (Crossover) Included: Yes

Y-Pipe Inlet Diameter: 2-1/2"

Y-Pipe Outlet Diameter: 3"

Catalytic Converter(s) Included: No

Quantity: Sold as a Complete Kit

CARB E.O. #: NOT LEGAL FOR STREET USE ON POLLUTION CONTROLLED VEHICLES

Warranty: Limited Lifetime to original purchaser

Notes::Will fit 6.2L engines, but fabrication to fit y-pipe outlet to exhaust system is required. 

WARRANTY:

Doug Thorley Headers carry a lifetime warranty against defects in material and workmanship to the original purchaser. Chrome plated items carry no warranty for finish, other than to be free from defects at the time of purchase, prior to installation. This warranty does not cover damage caused by misuse, abuse, collisions, improper installation, alterations, off-road use, racing use, commercial use, "burn-out" or cracking caused by excessive heat, superchargers, or external heat insulating wrap. Rust or corrosion that occurs after the product is installed is also not covered.