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Gnari Performance Exhaust Manifold

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  • Gnari Performance Exhaust Manifold

    Got my exhaust manifold today from Gnari Performance in california. I live in california so i needed something that looks stock so I can pass smog so I went with this. Comes with almost everything needed for the install. Has a hole to mount an external waste gate to. Won't have car running for some time but I wanted to post pics so others can see what it looks like.

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  • #2
    Looks like a decent piece from your pics, thanx for sharing! Let us know how well it fits up and if you have any issues with it once you are up and running. Interesting place for the wastegate location, as it would likely require some routing changes for the turbo's oil and coolant lines...but at least you have an option for an external unit.
    Ted
    86 SVO Mustang
    17 Cooper S Clubman ALL4

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    • #3
      Gnari manifold fit

      Originally posted by j0eyabs View Post
      Got my exhaust manifold today from Gnari Performance in california. I live in california so i needed something that looks stock so I can pass smog so I went with this. Comes with almost everything needed for the install. Has a hole to mount an external waste gate to. Won't have car running for some time but I wanted to post pics so others can see what it looks like.
      I read where this manifold locates the turbo about a 1/2" toward the passenger side when compared with the OEM manifold. It would be interesting to hear how it affects your downtube/exhaust connection and interference with the A/C line that snakes between the intercooler and the right spring tower. You will probably need a longer connection hose between the intercooler and the throttle body if you are using the OEM IC.

      Keep us posted!

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      • #4
        Once I get to that part of the restore I will let you all know. My AC pump doesnt work some I maybe converting over to the R-134a so will post picks once i get down to doing this install.

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        • #5
          Did you ever get this on the car?
          85 SVO 2A 205rwhp & 266 pounds torque!
          SDS Found, FMIC Built, Dash pad triple gauge pod

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          • #6
            I've installed the Gnari manifold with the external waste gate running a modified (stock) intercooler and have been happy with the results. I did this setup with a T3/T4 .50/.63 using the Gnari 4-bolt downpipe with a 4-bolt GT style hot side on the turbo. Everything fits together and lines up as it should. Other than needing a lower profile bolt for one of the mounts to clear the external gate, all the hardware included with the kit works fine. Here's a few takeaways....

            - There is no need for a gasket between the header and the head...instead you just use old school copper coat sprayed liberally and evenly to the manifold's mounting surfaces prior to assembly.
            - The manifold seems to flow better than the ported E6 that was on the car prior (butt dyno)
            - The manifold does move the turbo about 1/2 an inch away from the engine...the stock oil lines reach just fine but may require a little tweaking. The intercooler fitment requires grinding the inlet of the intercooler shorter if you want to use the stock intercooler or T-bird intercooler and a T3/T4...otherwise it sticks up too high and you can't shut the hood.
            - The external waste gate included in the kit has a 6 lbs. spring...which means you'll have to run and external boost controller or Gillis valve to get the boost up to even stock levels with this setup. Also the 6 lbs. spring makes the waste gate so sensitive that it makes the boost feel really laggy...its not...just too sensitive and comes open too easily. Going with a stronger spring in the waste gate solves it. That said, keeping the stock throttle body, intercooler and turbo with internal waste gate likely will negate any improvements from adding this manifold. Go big or stay stock, IMO
            "Some people are like Slinkies. . . Not really good for anything, but
            they still bring a smile to your face when you push them down a flight
            of stairs."

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