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Throttle body size question

Discussion in 'Performance & Fuel' started by 8 lug, Mar 1, 2010.

  1. 8 lug

    8 lug New Member

    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. JennaBear

    JennaBear Rockstar 100 Posts

    I believe yours is a 70mm. I don't see a huge reason to change out the throttle body, unless you are going FI. :neutral:
  3. 8 lug

    8 lug New Member

    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. JennaBear

    JennaBear Rockstar 100 Posts

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

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