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Any ideas on an exhaust or muffler for my 1st Gen 2.7 four banger?

Discussion in '1st Gen. Tacomas (1995-2004)' started by oldbleu, Nov 24, 2018.

  1. Dec 8, 2018 at 8:58 PM
    #21
    oldbleu

    oldbleu [OP] Member

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    The Thorley header and the Magnaflow exhaust look and sound real good. That is much better than the setup I am running at the moment. Thanks a bunch for the pictures and the info!! I had no idea there was a nice header available for the 2.7 four banger.

    It appears the part number is: THY-511Y-1-C
     
    Last edited: Dec 8, 2018
    US Marine likes this.
  2. Dec 8, 2018 at 9:22 PM
    #22
    US Marine

    US Marine Semper Fi

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    TRD supercharger , Doug Thorley header , K&N CAI 265/75-16 Toyo open country mud terrain , 15x8 Method Racing wheels , Rancho 3" lift , 4.88 gears , Detroit Locker
    Yes that's the part #
     
  3. Dec 9, 2018 at 12:34 AM
    #23
    UnderFire

    UnderFire Well-Known Member

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    Chambered mufflers like flowmasters don't really work great on small displacement engines because of how they try to alter the sound, you end up with a hollow sounding drone and raspy high end.

    You're likely after the sound of a straight through fiberglass packed type muffler. With an auto behind the 2.7 I'd probably want something like a larger dynomax ultra-flo. (20ish inches), would quiet it down significantly even from a 40 or 50 series flowmaster and give it a nice smooth tone. If you wanted it louder a straight through baffle-less magnaflow in the same size or something smaller like a borla or thrush super turbo would be something to look into.
     
  4. Dec 12, 2018 at 5:07 PM
    #24
    oldbleu

    oldbleu [OP] Member

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    Underfire, I like your idea. I found a hole in my Flowmaster (after 17 years) and decided to replace it with a Dynomax Ultra-Flo that was just over 20" long and has a 2 1/2" inlet and outlet. Summit dropped it off yesterday and today I had it installed today. It sounds great. It is much quieter than the FM and does not have that hollow sound. A complete exhaust overhaul will be a project for later. Thanks for the help guys!
     
    Last edited: Dec 14, 2018
  5. Dec 12, 2018 at 7:44 PM
    #25
    UnderFire

    UnderFire Well-Known Member

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    Glad I could help, I went with the same setup on my 3.4 powered truck when I noticed a few holes in the stock muffler, wanted to keep the volume down since the V6's sound like garbage when they're loud.

    I don't mind a louder sound with the 4 bangers though, likely gonna replace the 18" baffled magnaflow with something a little louder on my 4Runner.
     
  6. Dec 13, 2018 at 7:05 AM
    #26
    se7enine

    se7enine MCMLXXIX

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    Anything louder than stock gets annoying fast, not to mention if you're and early to work person it's also annoying to your neighbors.
     
  7. Dec 13, 2018 at 8:56 PM
    #27
    oldbleu

    oldbleu [OP] Member

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    It's been 17 years since I have heard what my truck sounds like with the stock muffler. I have been putting up with the noise of the Flowmaster that long. However, with only 80,000 miles on the truck, it does spend a lot of time parked in the garage. I just haven't had the notion to change the muffler out. The new muffler does sound very good. I can't imagine it being much louder than stock and certainly not not loud enough to create an issue with the neighbors.
     
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  8. Mar 14, 2019 at 10:07 PM
    #28
    pc24

    pc24 Member

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    Frame was replaced, still rust galore (not exactly modification;)
    Lovin what I'm seein/reading, on point! I put in MBRP CatBack TurnDown, love it, have another exhaust leak to tend to though so no sing-song yet...ordering the Thorleys tomorrow. Couple newb questions: Any pointers/vids on removing/replacing headers? Praying not to crack a bolt.. Titanium exhaust wrap? And lastly after header install, will adding the stock pipe after muffler instead of turn down quiet things down a bit?
     
  9. Mar 14, 2019 at 10:24 PM
    #29
    US Marine

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    TRD supercharger , Doug Thorley header , K&N CAI 265/75-16 Toyo open country mud terrain , 15x8 Method Racing wheels , Rancho 3" lift , 4.88 gears , Detroit Locker
    If you're ordering the same header as mine from Doug Thorley , there's no need for exh wrap . The header comes high temp nickle coated inside and outside. This means there's little to no heat transfer coming off the header . This allows for a much cooler engine compartment


    Still looks that good after 3 years !!!

    KIMG0027.jpg
     
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  10. Mar 14, 2019 at 10:57 PM
    #30
    pc24

    pc24 Member

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    Frame was replaced, still rust galore (not exactly modification;)
    Sure does Chuck! Thanks for that! It looks like there are 2 similar part #'s but fairly certain they are in fact different and not just typos THY-511Y-1-C and THY-511-C, the former being yours but listing says ceramic coated. I just put in an offer on ebay for it. Did you replace that cat? I'm in NY so good ole emissions for me...!
     
  11. Mar 14, 2019 at 11:05 PM
    #31
    US Marine

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    High Desert - Hesperia Ca
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    TRD supercharger , Doug Thorley header , K&N CAI 265/75-16 Toyo open country mud terrain , 15x8 Method Racing wheels , Rancho 3" lift , 4.88 gears , Detroit Locker
    Yes I'm running the Calif CARB compliant # THY-511Y-1-C and its a ceramic coating with a nickel finish

    I had performance muffler shop install mine and being at that time the mileage was only 57k original miles so the cat was in excellent shape

    By mistake I ordered the # THY-511-C header and It had the same coating as the correct header that's on my motor


    You'll like this header as it's a TRI Y design meaning cyl's #1-3 share a merge collector and cyl's #2-4 share the other and this design helps build low end torque
     
    Last edited: Mar 14, 2019 at 11:21 PM
  12. Mar 15, 2019 at 12:30 AM
    #32
    US Marine

    US Marine Semper Fi

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    TRD supercharger , Doug Thorley header , K&N CAI 265/75-16 Toyo open country mud terrain , 15x8 Method Racing wheels , Rancho 3" lift , 4.88 gears , Detroit Locker
    @pc24 I forgot to mention the header flange gasket that comes with the header will seal against the cyl head exhaust ports with no issues . The muffler shop that installed the header did recommended for a better set up would be by using the OEM exhaust manifold gasket and that is what I did !!

    This OEM gasket is much thicker and better than the Doug Thorley supplied gasket and seals much better . So I would if I were you is get the OEM exhaust manifold gasket from your local parts store
     
  13. Mar 15, 2019 at 11:22 AM
    #33
    Russianman92

    Russianman92 Well-Known Member

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  14. Mar 15, 2019 at 11:54 AM
    #34
    US Marine

    US Marine Semper Fi

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    TRD supercharger , Doug Thorley header , K&N CAI 265/75-16 Toyo open country mud terrain , 15x8 Method Racing wheels , Rancho 3" lift , 4.88 gears , Detroit Locker
    Uhh :facepalm: it's a Ceramic coated Nickle finish , not chrome . It will last much longer than a uncoated crack prone small Primary tube OEM exh manifold !!:thumbsup: . Also a ceramic coated header will drastically reduce under hood temps !!!!!

    And the Doug Thorley header is a true TRI Y Design with larger Primary tubes and merge collectors . I'm running a supercharger and this header helps scavenge exh gasses and stops reversion which makes more torque down low in rpm band


    What is a TRI Y header you ask ...... read here

    http://www.dougthorleyheaders.com/why-tri-y-52
     
    Last edited: Mar 15, 2019 at 12:11 PM

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