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what kind of headers do you run?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 87project, Dec 14, 2002.

  1. 87project

    87project Registered Member

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    My 87 Jimmy w/305 tbi needs a crankshaft,I don't want to rebuild a 305,so I picked up a 78 Chevy C-10 van with a rebuilt 350 (20,000 on it) for a motor swap.On the Jimmy I just got two 40 series Flowmasters w/no cats and two and a half inch pipes all the way.My question is what kind of headers do I need to pick up?Does 4 wheel drive make a difference?Thanks for any info /forums/images/graemlins/thumb.gif
     
  2. Sandman

    Sandman 3/4 ton status Author

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    I've had the Dynomax headers on a few different motors and have had no problems. They are pretty cheap too.
     
  3. SCOTTS_4X

    SCOTTS_4X 1/2 ton status

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    a buddy of mine picked up a set of shorty summit headers for his blazer and I was pretty impressed. the flanges were atleast 3/8 maybe 7/16, and they sealed very well. the tubes also weren't as thin as your run of the mill cheapie headers you pick up for 100 bucks. pretty afforbadle too.

    -Scott
     
  4. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">Run shortys. No collector gaskets to blow out, and they wont hit your shackle bolts. Heres mine
    [​IMG]
     
  5. SickboySS

    SickboySS 1/2 ton status

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    do you need a custom Y-pipe to run shorties?
     
  6. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">Yeah.
     
  7. Biguub91

    Biguub91 Registered Member

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    if you run a y-pipe with headers isnt that kind of pointless. Because all that "free-flowing" exhaust gets stuck at the the point where both sides of the y-pipe meet. It is pretty much a bottleneck. So why spend the money on headers and a custom y-pipe if your not gonna notice much of a difference?
     
  8. Bullet

    Bullet 1/2 ton status

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    I run Edelbrock TES on my 383, full-length and fit great. They are also coated for longevity. Needed cutom exhaust afterwards, so I had the muffler shop build a y-pipe to cross over behind the transfer case and connect to a flowmaster /forums/images/graemlins/thumb.gif
     
  9. mattyblazer

    mattyblazer 1/2 ton status

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    I run Edelbrock TES shorty headers, they bolted rite up, came with every imaginable spacer/ adapter, and a high flow y pipe.

    No problems
    Matt
     
  10. wrathORC

    wrathORC 1/2 ton status

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    I like my Hooker Competition headers. I got the pipe kit to go with it. The headers came with a spacer to use the AC bracket.
     
  11. 76_Cheyenne

    76_Cheyenne 1/2 ton status

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    Im running flowtech Afterburner headers. Says they give you more torque, but I just liked the price. They have been working awsome and add to a good sound.
     
  12. 79Beast

    79Beast 1/2 ton status

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    NOT Flowtech headers from Autozone (or anywhere else)! They might have a lifetime warranty, but they need it. Spend the $$ for a decent set....it IS worth it.
     
  13. Z3PR

    Z3PR Banned

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    I'm planning on getting the Doug Thorley Tri-Y headers in the future.
     
  14. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">My y-pipe is 3", no bottleneck there /forums/images/graemlins/rolleyes.gif. As long as the right pipe size is used and it is mandrel bent, single exhaust will make the same power as dual exhaust.
     
  15. Gary 86 K5

    Gary 86 K5 1/2 ton status

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    I just put a set of Dynomax headers on mine a few weeks ago. They bolted right up and have good clearance. Can't beat them for $100 at S /forums/images/graemlins/cool.gif /forums/images/graemlins/k5.gifummit.
     
  16. JIM88K5

    JIM88K5 1/2 ton status

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    JBA's. Not the greatest engineering with these turkeys. Got to modify the a/c bracket, bolt and spark plug access sucks ass. Need one strait boot plug wire on #5, the rest 90 deg. boots. Funky. They exit to a y pipe w/ a Blowlouder collector then 3in pipe, hi-flow cat, blowmaster muff, and a chrome tip (for pimp status). You will need to watch the flexplate on your swap. 87 is one piece rr main. 78 2 piece rr main.
    Jim
     
  17. Biguub91

    Biguub91 Registered Member

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    i see what you are saying BIGRAY but i still slightly disagree. i dont think that your three inch pipe is gonna flow as well as my dual 2.5 inch pipes. I dont think your gonna notice though unless your on the dyno. <font color="red"> </font color> (Any thoughts on this: I've had some people tell me that with hydraulic lifters; if your exhaust is to free flowing it can hurt you because your valves will not open as quickly. A little backpressure is needed. How much is to "free-flowing"? Is it gonna matter if your running anything but open headers?)
     

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