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Thread: throttle body size

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  1. #1
    Join Date
    Jun 2007
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    throttle body size

    does anyone know what size tb would come on a 05 RST silverado? is it a 75mm? Thanks for the help guys

    kyle
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  2. #2
    Join Date
    Aug 2007
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    Honeywood, Ontario
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    6,994
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    2006 Silverado
    Little Black Bitch

  3. #3
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    Jun 2007
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    maine
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    thanks!
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  4. #4
    Join Date
    Apr 2009
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    Lafayette, La.
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    63
    In all actuality, it is 75mm. The blade measures just under 75mm (2.95") and the intake inlet measures the same. It doesn't matter what size TB you put in front of the intake (75, 78 or 80mm), the intake inlet size is 75mm. It will only be able to flow as much as the inlet will allow. Believe me when I can tell you from experience, ALL 3 bolt truck DBW throttle bodies, stock and aftermarket, neck down to 75mm on the backside to be able to not cause problems going into the inlet. This is a very overlooked fact people don't consider.
    2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers, 31lb injectors

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