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Stainless Manifolds?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dyeager535, Apr 12, 2001.

  1. dyeager535

    dyeager535 1 ton status Premium Member

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    Anyone ever seen these? Looking through the '85/'86 Truck catalog last night, and noticed that RPO H5D is a Stainless Steel "header" style manifold for the 350. Looks like earlier manifolds, in that no part goes over the exhaust ports. 3 "runners" that drop down and join together. Appear to have a backwards (not straight down) facing exit on them. Haven't ever seen a pair myself, but never looked either since I had never heard of them! Still avaialble from GM supposedly, a measly $275 EACH from Gmpartsdirect.com.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  2. prjt_blzr

    prjt_blzr 1/2 ton status

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    GM used these in the early to mid eighties on both SBC and BBC. They seal real well, last forever and flow better than the cast manifolds. I really like these for a tow rig. I just haven't found a set for my BBC.
     
  3. HarryH3

    HarryH3 1 ton status Author

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    My engine has factory stainless steel mini-headers. They were standard equipment on '87 'vettes. I'm sure they don't flow as well as a full-on set of headers would, but they came with the engine and don't get in the way like regular headers do. [​IMG] I did a bit of cleanup work at the flanges and found that stuff is HARD to grind, even with carbide burrs. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     
  4. TX Mudder

    TX Mudder 1/2 ton status

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    There's a guy here locally who found a set of stainless factory headers in the jyard, picked them up, and put them on his 80's c10. He really likes them.
    -- Mike
     

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