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Throttle Body Size

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Old 12-10-2007 | 11:27 PM
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Default Throttle Body Size
What is the size of the OEM Throttle Body for a 1998 Z28.

Thnaks
Chris
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Old 12-10-2007 | 11:32 PM
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i think it's 75mm but i could be wrong...
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Old 12-10-2007 | 11:34 PM
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75.5mm but im not to sure either
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Old 12-11-2007 | 11:44 AM
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75.0mm http://www.smokemup.com/tech/ls1.php
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Old 12-13-2007 | 12:45 AM
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I'M NOT SURE EITHER!! LOL But no seriously it's 75 mm
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Old 12-13-2007 | 01:28 AM
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Originally Posted by conde'strans
I'M NOT SURE EITHER!! LOL But no seriously it's 75 mm
no its actually 74.999992mm, lol jk yea its 75mm
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Old 12-13-2007 | 06:19 AM
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75mm, maf is 75mm too
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Old 12-13-2007 | 06:46 AM
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the blade is 75mm

but with the "lip" that is just ahead of the blade (what is usually removed in porting), i think that narrows the actual TB opening to about 72mm.

but i'm not sure
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