New 5.7 Doug Thorley long tube headers

Never installed Doug Thorley long tubes (Land Cruiser & LX570) version that has no air. I have the blockoffs, all gaskets & the exhaust manifold nuts.Looking for 500 plus shipping, local West Valley of PHX pickup is OK!

They fit all 5.7 motors, they may need to be cut to fit at the cats on Tundras/Sequoias as they are designed for LX570.

I'm eventually going SC & Keith @ Dirtydeeds said not to use them. I paid 500 plus shipping and just want the 500 back for local pickup/meet up.

http://www.dougthorleyheaders.com/t...g-tube-tri-y-headers-(no-air-injection)_15788








7-10-23, DT's site is/was down. An alternate site for the info:



https://www.vividracing.com/doug-th...aders-toyota-tundra-20072017-p-152624854.html

This complete header kit makes huge increases in power output of your 5.7L Toyota. 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. This kit includes ceramic coated long tube tri-y headers and adapters to connect the headers to your factory y-pipe. To make these headers last, we built them using industry leading 14-gauge steel tubing with 3/8" thick flanges. Topping all of that off, our headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect them from the environment. All 100% American made, and backed by our lifetime warranty. Install these long tube headers today and feel your vehicle's true power potential!

Specification:

• Header Style: 4:2:1 Long-Tube Tri-Y Header
• Material: Steel
• Finish: Silver Ceramic Coated
• Weld Up: No
• Primary Tube Diameter: 1-5/8"
• 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 / Adapters Included: Yes
• Y-Pipe (Crossover) Included: No
• 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

Fitment:

• Toyota Tundra 07-17

These headers:

https://www.vividracing.com/-p-1526...VRbVbbU2RKbqdjqcESIvbSY_wCHisvCBoCyBcQAvD_BwE

This complete header kit makes huge increases in power output of your 5.7L Lexus. 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, we built them using industry leading 14-gauge steel tubing with 3/8" thick flanges. Topping all of that off, our headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect them from the environment. All 100% American made, and backed by our lifetime warranty. Install these long tube headers today and feel your vehicle's true power potential!

Specification:

• Header Style: 4:2:1 Long-Tube Tri-Y Header
• Material: Steel
• Finish: Silver Ceramic Coated
• Weld Up: No
• Primary Tube Diameter: 1-5/8"
• Primary Tube Gauge: 14 Gauge
• Collector Attachment: Factory Flange Connection
• Collector Diameter: 2-1/2"
• Tuned: No
• Flange Thickness: 3/8"
• Bolts and/or Studs Included: Yes
• Gaskets Included: Yes
• Reducers / Adapters Included: No
• Y-Pipe (Crossover) Included: No
• 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

Fitment:

• Lexus LX570 w/o Air Injection 11-13

 

Why aren’t they recommended for a sc?

 

Don't know. Keith said no. It's what he does so I believe him.

 

Also, all of these are north of 800 when available from DT.com (plus tax & shipping) & are all out of stock & have been for some time fwiw.

 

You can compare these vs the ones for Our trucks & see except the plumbing for the air they are the same:
My LX570s
http://www.dougthorleyheaders.com/t...g-tube-tri-y-headers-(no-air-injection)_15788
Tundra/Sequoia
http://www.dougthorleyheaders.com/t...-tundra-5.7l-v8-long-tube-tri-y-headers_15790

 

BUMP

 

Bump

 

I was asked about the O2 bungs, they are present, you can also see in the install instructions in the link the O2 sensors are there.

 

I got a used Hewett V1 G2 SAIS bypass:
https://hewitt-tech.com/product/secondary-air-injection-system-bypass-kit-gen-1-v54h/

And have 2 Universal J Style O2 Oxygen Sensor Restrictor Fitting with Adjustable Gas Flow Inserts & 3 Stainless Steel M18 X 1.5 Bung Thread O2 Oxygen Sensor Test Pipe Extensions for the O2 sensors

I'm getting closer to using them but until I do I'll include these at asking price.

 

The extenders came.

 

Sold to j_supra, please close.