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ls6 intake manifold

This is a discussion on ls6 intake manifold within the General Help forums, part of the LSx Technical Help Section category; i am going to swap the stock intake off of my 99 z to an ls6 intake, just trying to ...

  1. #1
    Junior Member afischer1289's Avatar
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    ls6 intake manifold

    i am going to swap the stock intake off of my 99 z to an ls6 intake, just trying to make sure it will be a direct replacement or if i am going to need any parts, also will it run ok without a tune????

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    NY Representative basballny2's Avatar
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    talk to vertiviper, he just did a complete swap with pictures.

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    NY Representative Vertiviper's Avatar
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    Quote Originally Posted by afischer1289 View Post
    i am going to swap the stock intake off of my 99 z to an ls6 intake, just trying to make sure it will be a direct replacement or if i am going to need any parts, also will it run ok without a tune????
    The only additional parts you will need is a coolant bypass. When you take off the LS1 manifold you'll see coolant lines running from the back of the block to the front and into the TB, the rear lines get plugged and the front remain.

    It's not a tought job, just take your time, look up "how to" there are tons of them.

    And everyone will tell you to be carefull to not break the oil pressure sending unit behind. If you can reach behind and unclip the wire to it you'll save urself loads of headaches trying to fish the brake booster hose through there.

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    Junior Member afischer1289's Avatar
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    one more question, does the ls6 intake really make that big of a difference?

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    Senior Member Too Fast's Avatar
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    ^^^from what I've read here, everyone who has done the swap says it is well worth it.
    They said it really wakes up above ~4,000 RPM, but not much change below that. Probably good for ~10 HP.

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    Junior Member afischer1289's Avatar
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    alright thanks

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    you can retain the stock ls1 coolant lines,care fully remove some of the ribbing on the under side of the ls6 intake.you can do a thread search for pics,all you need is a sharp chisel or dremel.you don't really need a tune ,but it will make a differance .consider a mail order tune from Frost.

  8. #8
    NY Representative Vertiviper's Avatar
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    Quote Originally Posted by afischer1289 View Post
    one more question, does the ls6 intake really make that big of a difference?
    For me it made a huge difference. Basballny2 drove my car, and he said.."wow, this feels like my car, only a little faster" we then realized it was because my ARH y pipe isn't crushed like the Kooks design.

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    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by Too Fast View Post
    ^^^from what I've read here, everyone who has done the swap says it is well worth it.
    They said it really wakes up above ~4,000 RPM, but not much change below that. Probably good for ~10 HP.
    10 Hp is about right I would guestimate.

    On my wifes car with a baby cam, the LS6 intake only picked the car up about .12 hundredths and a solid 1 mph on it's best pass compared to the LS1 intakes best pass.

    I would suggest doing the LS6 coolant lines too. They only cost about ~$35 or so from Thunder Racing. Worth it in my opinion instead of hacking the bottom of the intake.

  10. #10
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by Vertiviper View Post
    For me it made a huge difference. Basballny2 drove my car, and he said.."wow, this feels like my car, only a little faster" we then realized it was because my ARH y pipe isn't crushed like the Kooks design.

  11. #11
    NY Representative basballny2's Avatar
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    Quote Originally Posted by Vertiviper View Post
    For me it made a huge difference. Basballny2 drove my car, and he said.."wow, this feels like my car, only a little faster" we then realized it was because my ARH y pipe isn't crushed like the Kooks design.
    when did i drive your car?

  12. #12
    NY Representative Vertiviper's Avatar
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    Quote Originally Posted by basballny2 View Post
    when did i drive your car?
    Right before you woke up with a wetness in your boxers..

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