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Thread: NNBS intake manifold

  1. #1
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    NNBS intake manifold

    I'm pretty sure the NNBS manifold will bolt right up to an '06, but will all the sensors plug into the harness as well? TB, MAP, etc.? Also, doesn't the NNBS manifold have a bigger 4-bolt TB?

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

  2. #2
    For the tb you'll need the torque rush harness, it's a 87mm vs a 78. Your map sensor will connect right up you just have pull the harness out some.
    2004 Silverado ext cab 5.3 Patriot226,Pacesetter LTs, Synergy Tune-TruTrac yankpt3600,Volant Cai, FLT 4L70e level 6

  3. #3
    What he said^^^
    03' Silverado RCSB H/C 5.3, 4L80,76mm KBracing Kit
    13' Sierra Denali 2500HD CCSB 4x4

  4. #4
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    Quote Originally Posted by nickpc82 View Post
    For the tb you'll need the torque rush harness, it's a 87mm vs a 78. Your map sensor will connect right up you just have pull the harness out some.
    Do you mean the wiring harness or the throttle body throat needs the "torque rush adapter"? I am only concerned with the wiring harness being able to plug into the manifold. I can handle the piping into the throttle body as I will be running a front mount.

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

  5. #5
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    wiring harness that plugs in ur tb
    04 rcsb forged 347

  6. #6
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    Sweet! So everything else is just plug and play?

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

  7. #7
    Wat injectors will you be using? Is urs flex fuel?
    03' Silverado RCSB H/C 5.3, 4L80,76mm KBracing Kit
    13' Sierra Denali 2500HD CCSB 4x4

  8. #8
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    Siemens 60#ers and, no, it's not flex fuel.

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

  9. #9
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    The swap is simple. You need a plug in play wiring harness for tb, I used Dr.x link. The map sensor reachs if you plug it out of the big housing that it's in. The gromet on it was different size on the nnbs intake, so I used a new piece of rubber, or tape to make the gromet bigger so it would fit in the hole nice and snug. The PCV should all have a place to go, might need to fab some pieces to work, I used rubber fitting, because my intake didn't have a nipple on top for a nose, just a hole that was suppose to have a nipple, so I made it work. Even if you weren't doing a front mount, whatever intake tube you were using would work. The tb is a different size, but the out side diameter of the tb where the tube tightens to tb is same size on almost any tb, maybe not a 102 but for the 87 it's the same. Good luck with the swap.
    chevyboy.520
    06 ecsb 5.3, FAST LsxRT 102, FTI cam! LT's, tru dual, magnaflow, 3400 stall, Performabuilt lvl2, 4.10s!
    PRC stg 2.5 5.3 heads Awaiting to go on!

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