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Thread: 20v throttle differences

  1. #1
    Member Anthony13's Avatar
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    Default 20v throttle differences


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    Hey all I have a 16v bigport 4age and I'll eventually be putting cams and ITBs on it I've already got a set of silver top ITBs and an emanage for it and I no I need an adaptor bracket for them to fit my 16v but I was wondering what are the differences between the black top and silver top ITBs because I've read that they are slightly different in some way?

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    Veteran Jimmee1990's Avatar
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    Silvertop throttles are a bit smaller diameter than blacktop.

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    Oh cool thanks

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    Senior Member s13 james's Avatar
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    i think,silver top are 42 mm and blacktop are 45 mm

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    James is right, the blacktop throttles also have a kidney shape out the back of them. You would likely loose power fitting them instead of the silver to your engine.
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