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Doug Thorley Headers Part #THY-509Y-C Customer Reviews
9 Customer Reviews
Reviewed by MARCUS D (CORONA, CA) Reviewed for a 2013 Toyota Tacoma — May 09, 2017 10:08 PM
Header was well built. Great finish, very pretty. Install was a pain, but I figured it out. The egr housing hits the header flange, so I enlarged the mount holes with a drill bit and it shifted the egr just enough. Install took me 3 hours and I am an experienced mechanic. First test drive I noticed no difference. After a few fillups and the computer adjusted and get better pedal feel and little better fuel economy. Even with the hassle of the install, no regrets.
Reviewed by robert f (OCOEE, FL) Reviewed for a 2005 Toyota Tacoma — Dec 21, 2015 12:08 AM
Very impress with the quality put in, heavy gauge, and plating of headers. The graph they used for power & torque was unbelievable. Which show twice as much as stock, something you get with maybe a supercharger. It was too hard to believe, and I know I didn't get anywhere that. One thing the manufacture wouldn't answer for the 05 Tacoma 2.7L was why the tubes weren't of equal length?
Reviewed by William C (Greensburg, PA) — Jan 27, 2014 2:02 PM
Arrived quickly,well packed and complete > installer reused 20i3 gasket (not included w/ headers) only problem was location of a 'bolt' that nearly defied removal > Toyota's < Too early to calculate mileage but the Tacoma (2.7 liter motor) now climbs over Laurel Ridge in OD;before the K&N and new headers we needed 4th gear to get over. Assuming that the mileage will improve along with the power gain. Sounds Fine. WEC
Reviewed by kai l (VENTURA, CA) Reviewed for a 2012 Toyota Tacoma — May 13, 2013 10:02 PM
Overall I'm impressed. The installation will require right tools and donut ring gasket t exhaust pipe for Toyota Tacoma 2.7 2012. Definately helps with acceleration! Make sure to drive vehicle hard after install, and re tighten torque header.
Reviewed by Jeffrey K (Torrington, CT) Reviewed for a 2006 Toyota Tacoma — Mar 25, 2009 6:29 PM
I put this header in my 2006 2.7 tacoma. It definately adds to high end torque and horsepower. I could feel the difference within 5 seconds of driving it. A header definately worth buying for the price.
Reviewed by Dennis D (Merlin, OR) Reviewed for a 2017 Toyota Tundra — Mar 14, 2008 11:59 AM
Awesome! Doug Thorley knows what they are doing...better than the stock Toyota headers (2.7 L four) and I definitely can feel the difference in horse power...passed a 2007 or 2008 Toyota Tacoma V6 going up a hill in fourth gear with power to spare! I added the K & N cold air intake system, replaced the first catalytic converter with a high flow/Hi-temp (Magna Flow)catalytic converter (kept the second catalytic converter stock) & replaced the stock muffler with a stainless steel Magna Flow oval that was smaller in size to reduce weight and for; increased HP, Gas Mileage, and great sound too! I am very happy with Doug Thorley, the stock Toyota headers were crimped and the Doug Thorley have a better forced air flow cooling system than the stock headers too! They went on perfectly and I bought the cermaic headers for better perfromace and cooling as I am not using the Toyota stock heat deflector...don't feel it is of any benefit with the set up I now have! Thus, Doug Thorley does know what they are doing and they have been around the business for 40 + years...what more can I say?
Ships Between 6/19 - 6/21
- What Do You Drive?
- Style:Ceramic Coating
- Part #:THY-509Y-C
- Passenger Header Exit
- Mild Steel
- 1 1/2 inch primary
- 2 1/4 inch collector