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LS1 Intake Size "Throttle Body"

This is a discussion on LS1 Intake Size "Throttle Body" within the External Engine forums, part of the LSx Technical Help Section category; Iam looking to buy a new throttle body, but I am seeing different sizes "90mm and 80mm" What size do ...

  1. #1
    Go Vols! x10-wakerider's Avatar
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    LS1 Intake Size "Throttle Body"

    Iam looking to buy a new throttle body, but I am seeing different sizes "90mm and 80mm" What size do I need for a stock ls1 intake?

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    1990

    80 or 85

  3. #3
    Boosted Foolz
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    BlAcK
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    ur stock throttle body is 75mm, a bored out one should be 78mm, the BBK is an 80 mm, and some people bore out the bbk to 85mm... tho i think if you went that big you would need to port teh opening in the ls1 intake to 85 as well, but i could be wrong. the 90mm throttle bodys for ls2 and FAST intakes

  4. #4
    speedo
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    I have everything you need right here for your setup with this intake and TB. TPIS Modified ZO6 intake with a 75x90mm TB. Probably 35+hp over your stock 78mm/ls1 setup. Maybe more depending on what other mods yu have done. 900$ shipped.


    Shoot me a PM and I will get you some pictures.

    I assume your still running the LS1 intake?
    Last edited by speedo; 11-09-2005 at 03:18 PM.

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