G/S - ST Header pipes

Discussion in 'Old's Cool' started by TEXASYETI, Nov 22, 2008.

  1. Frank Warner

    Frank Warner Traveller

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    G/S to GS ? No - of course not ! Go look at the part numbers...
    #21
  2. Caddy82rats

    Caddy82rats Long timer

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    OK, I was thinking that the outlet tubes from heads was the same, and diferents silencer and "collector box".
    All my exhaust is rusted on my G/S... One solution less !
    #22
  3. TEXASYETI

    TEXASYETI Call me "thread killer!"

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    Well, here is the scoop. I tried to find the 36mm tubing which could then be flared to 38mm where is goes into the head with the 36mm end for the collector box. But that was not readily available. I then thought about trying to modify the inlets to the collector box to accept a 38mm (1.5") which is easy cheesy to find and there seem to be lots of BMW headers that are consistent 38mm diameter all the way through.

    However, having no real metal working skills, no tools, and nowhere to do the work, I took some other headers I had to my local top alcohol dragster chassis builder. He is going to extend the headers and put the little funky bend in the end. I will post the results.

    I think this result will work better on the bike than the crappy 2 into 1 and supertrapp setup I have now.

    I did find some cool venders as I looked for materials. One place in Ohio could digitally map the original headers and then spit out as many copies as you want. Find the material and you are in business!
    #23
  4. TEXASYETI

    TEXASYETI Call me "thread killer!"

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    ST headers will fit and motobins had G/S header pipes for about 270.00 a pair + shipping.
    #24
  5. Frank Warner

    Frank Warner Traveller

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    Mind reading is not my field!

    The header pipes are not the same because teh collector box is not the same ....

    The head outlets are the same .. if you want to replace the entire system .. there is a difference in the muffler mountings .. paralever vs mono lever things too I'd think ..

    However .. unless your replacement is in stainless steel .. it is going to rust out too.
    #25
  6. TEXASYETI

    TEXASYETI Call me "thread killer!"

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    Here is what I decided to do: Take a set of headers I had with a crosspipe and have them extended to fit the stock collector box set-up. The guy had to build a couple little jigs to make it work but the results came out pretty nice.

    First though, the collector box had some rot on the backside. We could not grind down the seam weld and replace so we put a plate in:

    [​IMG]

    Here are the extended headers. Everything matched up really well with a set of G/S we used as the masters. My buddy could not get the bends as sharp as the factory pipes and I hope they are no clearance issues. Going to fit them this weekend:

    [​IMG]

    Here is a picture of the set-up:

    [​IMG]

    Next obvious question is am I going to high temp paint, chrome, ceramic coat, etc. the headers? Any thoughts about either option would be very cool. I am leaning towards a cermaic coating but have never had that done before.
    #26
  7. elmontanero

    elmontanero Practicing...

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    Did we ever find out how this turned out?
    #27