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  1. #1

    Default Throttle body size question

    Anyone know what the throttle body size on my truck is offhand? Its a '03 2500hd 4x4 with the 6.0L. Im looking to get a new one and wanted to compare the sizes.

    Thanks in advance.

  2. #2
    Sr. Engineer
    Join Date
    Jun 2009
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    San Diego, CA
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    Default

    I believe yours is a 70mm. I don't see a huge reason to change out the throttle body, unless you are going FI.
    Black Bear Performance- Custom Tuning Solutions

    Authorized EFILive and MAGNACHARGER seller

  3. #3

    Default

    I was considering going to a 80mm BBK. My understanding is it does at noticable horsepower and lower end response. Of course, I have no first hand knowledge of that so I may have to rely on you folks here for guidence.

  4. #4
    Sr. Engineer
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    Jun 2009
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    San Diego, CA
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    426

    Default

    Not really worth it IMO. If you were going FI, I would suggest getting a 90mm TB if anything.

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