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Thread: narrowest stock exhaust manifold?

  1. #1
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    Question narrowest stock exhaust manifold?

    I was wondering if anyone on here could tell me which set of exhaust manifolds would be the narrowest setup, width wise? I have a stock LQ9 out of a 04 HD and am literally stuffing it into a Toyota Tacoma and the flanges at the end of the manifold just barely clear the frame and I would like to gain some additional clearence. Any info or leads to a manifold or headers that would help me out is greatly appreciated. I will try to post a picture of where its sitting at soon.

  2. #2
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    98 fbody manifolds tuck really tight against the block.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
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    Make sure you really have an LQ9 if you care. The SSR manifolds are kinda tight too but probably hard to get.

  4. #4
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    Quote Originally Posted by RedHeartbeat View Post
    98 fbody manifolds tuck really tight against the block.


    Thanks for giving me something to start looking at! Here is a picture of the truck and engine as it sits right now, waiting for the TH 400 to get here so I can double check all the clearences before I start to build the engine and Transmission mounts.

  5. #5
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    Quote Originally Posted by GasGuzzler View Post
    Make sure you really have an LQ9 if you care. The SSR manifolds are kinda tight too but probably hard to get.
    It has LQ9 cast on the back of the block and came out of a 2500 HD. And I did'nt see any valve reliefs cut in the piston when I pulled the plugs, but it was pretty hard to see much in there.

  6. #6
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    usually they are LQ4 out of HD?


    I could be wrong?
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  7. #7
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    Could be, when I get it cleaned enough to find a serial # Ill check it.

  8. #8
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    Well its definitely an LQ9, I am hoping to have a new harness put together by the weekend and I should have the fuel lines run by then as well. I did get the engine and tranny mounts knocked out this weekend, but have not been able to locate any f-body manifolds for a reasonable price. The junkyards here in Phoenix are crazy they want $350 for used manifolds! The headers I have measured are just as wide as the manifold so I may be doing something really crazy if I cant find anything narrower than what I have. Here are some pics of the progress I mad this past weekend.



  9. #9
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    Quote Originally Posted by weldithto79 View Post
    It has LQ9 cast on the back of the block and came out of a 2500 HD. And I did'nt see any valve reliefs cut in the piston when I pulled the plugs, but it was pretty hard to see much in there.
    no stock piston has reliefs in it. ive had 2 LQ9s and neither say LQ9 on them.


    if it came from a 2500 its a LQ4
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  10. #10
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    Well I got a few things done on the LQ4, finished routing the fuel lines, replaced the plugs and wires, on plug had cracked porcelain and two wires were missing. I also got the flexpate mounted and torqued the F-body oilpan down. I will be picking up the custom harness on saturday and hopefully test firing the engine. Does anyone have any leads on some F-body exhaust manifolds? I will be in Texas at the end of June, first of July and will be visiting friends and family all over from Abiliene to Brownwood, Llano and San Antonio, so I could pick them up then and you can see the truck, Should be drivable by then so Ill be bring it with me.

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