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Looking for the right EXHAUST HEADER

Discussion in 'The Garage' started by badmix, Mar 16, 2005.

  1. badmix

    badmix 1/2 ton status

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    hello all. I look around here alot but dont participate much. Anyways. I have a 1984 K5 blazer. Im tryin to find a good set of headers that will fit good. Ive heard horror stories about headers being close to the frame rail and up against the starter, etc. Any help is appreciated. Thanks
     
  2. AkMudr

    AkMudr 1/2 ton status

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    Edelbrock or Doug Thorley shorty headers. Bot right in place of the stock manifolds
     
  3. beater_k20

    beater_k20 Banned

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    Flowtech... they're dirt cheap, and they fit great.
     
  4. bushmaster

    bushmaster 1/2 ton status

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    hedders

    i have headman tork step headers on mine they fit good although u need to use accell shorty hedder sparkplugs or u will burn your spark plug wires.also the 3 bolt header flange where u hook your exhaust pipes to the collecter suck on all the headers ive used so i got a set of flowmaster ball and socket connectors and welded em to header collectos they r great 3 years and no leaks
     
  5. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    second that.
     
  6. k20

    k20 3/4 ton status

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    thorley doesnt make shorties (that im aware of, ive been wrong once or twice before), but I had thorley Tri-Ys on my old 350, got em again on my big block, I recommend em everytime I see a post like this, they are expensive, but IMO, the best. Hooker used to be good, but quality is going downhill from the recently purchased sets Ive seen.
     
  7. Z3PR

    Z3PR Banned

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    Doug Thorley Tri-Y's would be my first choice in a full size Chevy 4wd truck. I would not use "Cheap" headers !!!! I don't like having too replace them a year or 2 later.
     
  8. WhiteBurb

    WhiteBurb 1/2 ton status

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    I've got Dynotech headers. They're good, but the collector flange is within 1.5" of the shackles which makes me worry when I flex it out.
     
  9. Jonny-K5

    Jonny-K5 1/2 ton status

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    thorleys. best header out there IMO. you pay for what u get. the only problem i had was from having the transfercase shimmed down. the ypipe gets real close to the framerail.i just bent the lip a little, problem solved. if you havent shimmed down you Tcase for better driveline angles, then u wont have a problem.
     
  10. beater_k20

    beater_k20 Banned

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    BTW, Flowtech and i believe Dynomax headers have a lifetime warranty if purchased from Auto Zone.
     
  11. badmix

    badmix 1/2 ton status

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    Thanks guys, I appreciate the quick response. ill check into the thorley ones.
     
  12. Z3PR

    Z3PR Banned

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    Summit sells them.
     
  13. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    I've got Thorleys (#304-Y) on my K5....

    You can check my gallery link below for pics of the headers and some installation challenges they presented.....

    I like the headers, but they didn't fit the way I'd hoped.
     
  14. Rob 85K5

    Rob 85K5 1/2 ton status GMOTM Winner

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  15. CHEVY 4WD

    CHEVY 4WD 1/2 ton status

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    ALL Headers for a SBC are gonna be really close to the starter... BTW I dont really like "cheap" headers either they usually last 2 years then you gotta replace them plus they usually leak. Your best bet is to get a quality header with thick flanges and some type of coating (other then paint).
     
  16. SUPER'BURB

    SUPER'BURB 1/2 ton status

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    I love my tork steps but Bush is right about the plugs and wires.
     
  17. matto

    matto Registered Member

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    anything but flowteck. they fit like crap on my truck
     
  18. 89fullsiz

    89fullsiz Registered Member

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    hey on those flowtechs did you have a set that fit all the emission crap on your 91? Do you have a part number. Did you feel any difference after the install?
     
  19. badmix

    badmix 1/2 ton status

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    Welp, I cheaped out and got some Hooker headers. The drivers side fit perfectly, the passenger side hit the shackles. Well Lessons learned, I had painted them b4 tryin to install them, so now the shop wouldnt take them back. No biggie, I went to muff. shop and they tweaked the header and now it fits perfectly, I had them weld up the reducers and finalize the exhaust system. Im happy with the outcome , but dissapointed in the fit. Oh well. When funds become available, ill get the Thorley headers, I called them and they guarantee the fit will be good.

    Oh and driving 10miles with open headers on the hi-way isnt as cool as youd think. lol. :grin:
     
  20. ntaj*ep

    ntaj*ep 1/2 ton status

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    I have a set of Stan's headers, basically the same as the Thorly's they are for a different year Chevy I had some issues with them but the power gained was well worth the install issues. BTW I have had them about 5 years now and only replaced the gaskets once. :cool1:
     

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