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Doug Thorley Header Kit - 2RZ/3RZ Dual Cat With EGR
Doug Thorley Header Kit - 2RZ/3RZ(Dual Cat w/EGR)

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Our Price: $334.95

Part Number: 1046090


Doug Thorley Header Kit - 2RZ/3RZ 2000-2004 Tacoma Dual Cat w/EGR

C.A.R.B. Number: EO# D-540-6

Doug Thorley Headers THY-511Y-1-C tri-y headers deliver the ultimate in performance and gas mileage for your 2000-2004 Toyota Tacoma, 4-Runner. Doug Thorley Headers is the originator of the tri-y header design, which is the most efficient way to increase horsepower and torque over a broad RPM range, and more importantly the range where you use it most. That better exhaust flow produces noticeable gains in horsepower and torque output, while increasing fuel efficiency.

The headers are manufactured using heavy duty 14GA steel tubing, and super flat 3/8 inch head flanges. They are then silver ceramic coated inside and out, which looks great, drastically reduces under-hood temperatures, and creates a strong barrier to protect the headers from the environment.


2000-2004 Toyota Tacoma, 4-Runner / 2.4L-2.7L, stock manifold with dual outlet flange and rear facing EGR tube, 2WD & 4WD.

see 1046095 if your stock manifold has a single outlet flange and no rear facing EGR tube.

Application Notes:

-Fits 2RZ and 3RZ Tacoma's

-Fits 2WD & 4WD

-This header has a dual outlet flange

-This header has an EGR flange on top primary tube

-For non EGR, single outlet flange header see part #1046095

Contact our Tech Support Line for further information at 928-855-6341.

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Note: Images are for illustration purposes only. Images MAY NOT represent the product listed. Please contact Customer Service with any questions or concerns: 928-505-2501.

Average Customer Review: 4.5 of 5 Total Reviews: 4 Write a review.

  0 of 0 people found the following review helpful:
Faster than other reviews said November 5, 2018
Reviewer: Max Stockton from LAKEPORT, CA United States  
Delivered with excellent Doug thorley packaging in three weeks. New gaskets, new bolts, & well wrapped.

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  0 of 0 people found the following review helpful:
Great header December 26, 2017
Reviewer: Nick Stewart from Bonney Lake, WA United States  
This is a great header that replaces a cracked stock cast header!!  It even gives you better flow!

Like the other review it took almost 2 months to arrive (Not LCE's fault).  

I am docking it one star because they plate it after they tap the collector bolt holes.  The screws were not easy to go in, so I had to run a tap through them again to make them smooth.

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  0 of 0 people found the following review helpful:
Doug thorley header December 21, 2017
Reviewer: Tyler Jarred from Monroe, OR United States  
Item purchased looks great.
Only complaint is it took over a month to arrive.
On the plus side every time I would email then they would get back to me within minutes!

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  1 of 1 people found the following review helpful:
Doug Thorley 3RZ Header July 7, 2016
Reviewer: Mike Brown from San Diego, CA United States  
The header fit like a glove. The ceramic coating is excellent.
Great addition and keeps the under hood temps down. The EGR tube bolted up without issue.
I would recommend this to anyone with this motor.

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