1987 W150 318 -- No headers available?

Discussion in 'Engine & Performance' started by blastmagazine, Oct 14, 2013.

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  1. blastmagazine

    blastmagazine Junior Member

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    hey all -- I went out and bought this system:
    http://www.summitracing.com/parts/sum-cbjj111/overview/year/1987/make/dodge/model/w150

    For my 1987 W150 with a 318, but my mechanic told me that it is impossible to fit headers to the truck because the engine has "air injection cylinders" which I guess is an emissions feature that Dodge added in 1987.

    Am I SOL? Anyone else encounter this issue? Am I stuck with exhaust manifolds or are there options?

    Thanks!
     
  2. crazzywolfie

    crazzywolfie Senior Member

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    well i guess it really depends on where you live. you do have to tap some things in the head and put plugs in them to install headers but it should be not that big of a deal. now if you have emissions air pump then you might have a bit more of a headache than it is worth if you live somewhere where emission is a big thing like California.
     
  3. dodge dude94

    dodge dude94 Senior Member

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    I bet you can mount them just fine once you delete the Air stuff.
     
  4. Deblackmon3

    Deblackmon3 Member

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    I already took off the air pump, it was just getting in my way :p Thankfully I live in South Carolina, so no emission legislation to deal with. I could run straight headers with no mufflers and I would be in the right legally, it would just be INCREDIBLY loud and that's what would get me a ticket, not emissions. :death:

    If you do take off the smog gear, realize that your cat converter is gonna take a huge hit and cut down its life span, maybe up to half. Make sure like what Crazzywolfie said to plug up the holes in the headers and exhaust manifold, or if available just weld a plate on them to seal it, that way the plug can't come loose at all.
     
  5. crazzywolfie

    crazzywolfie Senior Member

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    if he puts headers on there will no longer be exhaust manifolds. the holes i am referring to are in the heads them self. they have to be tapped and plugged because headers do not cover the small emissions holes.
     
  6. blastmagazine

    blastmagazine Junior Member

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    So..and this is foolish I know. How can I tell if I have a passive or an active system?

    What is the best tactic for tapping and plugging these holes without doing damage?

    Is it even worth the extra $600 or so a mechanic is going to charge me, or should I just stick with manifolds?
     
  7. crazzywolfie

    crazzywolfie Senior Member

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    not a clue what you are talking about.

    you buy a tap, tap the hole a couple threads and insert plug with some thread locker on it. now knowing these older trucks you might get lucky and the hole may be full of carbon. the carbon may hold.

    depends on what that $600 includes. if that $600 includes the cost of the headers and new y-pipe and the mechanic installing it i don't think it would be too bad of a deal. i don't think you will notice any performance difference if you have a stock engine but it might make your truck sound a bit different and prepare you for future mods like a 4 barrel carb.
     
  8. blastmagazine

    blastmagazine Junior Member

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  9. 88rambigblock

    88rambigblock Senior Member

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    1. remove exhaust manifold.
    2. drill those tiny emissions holes and tap them.
    3. insert set screws into those freshly tapped holes
    4. install the headers of your choosing.

    it really is that easy.
     
  10. 88rambigblock

    88rambigblock Senior Member

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    so youre looking at 15 bucks max for set screws, 150$ for summit racing headers, and an exhaust shop can do an entire exhaust for you for less than 300$. so this whole project shouldn't cost you more than 465$.
     

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