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  1. #1
    Duke's Avatar
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    GPR-SHO exhaust manifold

    Don't want to clutter up Bruce's great thread with my ramdom halfwit brainstorms but wondering on different alternatives for the exhaust manifold. Welding to cast can be a handfull especially if its porous.

    Not having one in my hand limits my thoughts on the matter but could this be cut up and and just use an inner and outer coupler with a machined rear coupler? Imagine the connection between the U-pipe and Stinger on the GPR. Couldn't the stinger just be a billet machined part with 2 couplers and a straight outlet??

    Just thinking out loud.


  2. #2
    Hydrotoys's Avatar
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    Not sure if the stock one, even fits in the hull. I haven't seen any really close pictures on a stock manifold sitting in a gpr hull, so I'm was under the impression that the outlet is facing the hull or inner liner.

  3. #3
    Duke's Avatar
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    Quote Originally Posted by Hydrotoys View Post
    Not sure if the stock one, even fits in the hull. I haven't seen any really close pictures on a stock manifold sitting in a gpr hull, so I'm was under the impression that the outlet is facing the hull or inner liner.
    I'm talking about cutting it like you would for the weld prep and just using couplers and an adapter after that. Needs to be a straight shot to the waterbox.

  4. #4

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    Quote Originally Posted by Hydrotoys View Post
    Not sure if the stock one, even fits in the hull. .
    It won't. In the parts picture #6 that is the piece that needs to be modified. Though it doesn't show much of it, there is a pretty big bend in that pipe that needs to be taken out for it to fit in GPR. And, you have to add angle to the waterbox. Pics from my build.
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  5. #5
    Hydrotoys's Avatar
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    Quote Originally Posted by Duke View Post
    I'm talking about cutting it like you would for the weld prep and just using couplers and an adapter after that. Needs to be a straight shot to the waterbox.
    Well, you could do it like the anaconda pipe Duke, but it's really not worth the liability issue to me. I sure like my welded pipe.

  6. #6
    Duke's Avatar
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    Quote Originally Posted by Hydrotoys View Post
    Well, you could do it like the anaconda pipe Duke, but it's really not worth the liability issue to me. I sure like my welded pipe.
    Just thinking out loud. Didn't see the problem with adding a flex joint before the WB. Welding to shitty cast aint always the greatest alternative IMO.

  7. #7
    Duke's Avatar
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    Quote Originally Posted by SHOdude View Post
    It won't. In the parts picture #6 that is the piece that needs to be modified. Though it doesn't show much of it, there is a pretty big bend in that pipe that needs to be taken out for it to fit in GPR. And, you have to add angle to the waterbox. Pics from my build.
    Other then obvious (and correctable) exhaust alighnment issue, your driveline couplers appear to be touching. They should really have about an 1/8" gap.

  8. #8
    Hydrotoys's Avatar
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    Honestly, just from surface appearance, this isn't a crappy cast like what we've seen on the SD cases or some of those other nefarious economy casting processes. I was very impressed with the material, and the welds. Not bad. I'm no expert, but I'd say go for it (in this case.)

  9. #9

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    Quote Originally Posted by Duke View Post
    your driveline couplers appear to be touching. They should really have about an 1/8" gap.
    I'll double check, but I think it's within spec.

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