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Tips On Doug Thorley Headers for 4cyl

Discussion in 'Performance and Tuning' started by TacomaGus, Aug 13, 2009.

  1. Aug 13, 2009 at 3:45 PM
    #1
    TacomaGus

    TacomaGus [OP] Well-Known Member

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    i am planning on getting a set of DT headers in the future but i don't know what to go with, short or long. I'm looking for more low end HP not so much in the higher RPM range, also i'm looking for the best place to get them? Anyone know who has the best deal?
     
  2. Aug 13, 2009 at 3:47 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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  3. Aug 13, 2009 at 3:59 PM
    #3
    TacomaGus

    TacomaGus [OP] Well-Known Member

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    I've never heard of these guys before but they seem like high quality stuff, i may have to give them a call sometime next week and see what they run and the other details

    thanks for the tip tho chris...
     
  4. Aug 13, 2009 at 4:01 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    I ran their Header on my 2.7, and it was a huge improvement. Let me know what they say. ;)
     
  5. Aug 13, 2009 at 4:05 PM
    #5
    TacomaGus

    TacomaGus [OP] Well-Known Member

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    they say the headers "quiet" the truck down, i have a flowmaster and i really like the sound as it is, but you don't think it would affect that would it?

    and i'm looking for a low to mid-range RPM gain is that what it did for you? and how much do you think? haha sorry for all the questions and thanks again chris
     
  6. Aug 13, 2009 at 4:07 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    It will have no affect on your sound from the muffler. IIRC, I got about 14 hp or so from the header. Low and mid gains were very impressive. Top end was slightly better than stock.
     
  7. Aug 13, 2009 at 4:14 PM
    #7
    TacomaGus

    TacomaGus [OP] Well-Known Member

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    wow a 14 hp gain on an engine that's only running around 150 stock would be very noticeable! i'm likin the idea of the North West Off Road headers now haha
     
  8. Aug 13, 2009 at 4:16 PM
    #8
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    It supprised me too. When I would be in 5th gear, it felt like I was still in 4th. Very well made header, too.
     
  9. Aug 13, 2009 at 8:39 PM
    #9
    TacomaGus

    TacomaGus [OP] Well-Known Member

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    also what year was your 4cyl chris? cuz on their website it says the headers are for the 96-01 tacos, but i don't see why they wouldn't fit the same engine
     
  10. Aug 13, 2009 at 8:58 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Mine was a 2000. Call them and see if they will fit. I dont know what the reason they would fit would be.
     
  11. Aug 13, 2009 at 9:00 PM
    #11
    DanGer

    DanGer Avatar approved by 98tacomav6

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    Chris has you on the right track. I installed my Doug Thorely long tubes a few days ago. I feel like I lost a wee bit in the low range, but got a nice gain at 1500 and above
     
  12. Aug 14, 2009 at 4:24 AM
    #12
    Niknaq

    Niknaq Phightin Phils 2008 Champs

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    Chris 4x4 or anyone please answer my three questions.

    1. How much does it cost to get installed at a average local exhaust shop?
    2. How will gas mileage improve or will it not?
    3. How does this affect my warranty if it does at all?
    4. Should I buy a y-pipe or short or long headers and why?

    Thanks
    i know its 4
     
  13. Aug 14, 2009 at 6:01 AM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Not sure of the install cost
    I didnt notice an increase in MPG
    It shouldnt affect the warranty
    No Y pipe needed on the 2.7.

    :)
     
  14. Aug 14, 2009 at 6:04 AM
    #14
    Niknaq

    Niknaq Phightin Phils 2008 Champs

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    thanks chris 4x4
     
  15. Aug 14, 2009 at 6:05 AM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    ;)
     
  16. Aug 14, 2009 at 6:08 AM
    #16
    Niknaq

    Niknaq Phightin Phils 2008 Champs

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    so short or long headers?
     
  17. Aug 14, 2009 at 6:11 AM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    I havent tried different lengths on the 2.7. I have found that the Tri Y desigen gives much more bottom and midrange than the "regular" 4 into 1 headers.
     
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