C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Throttle Body Bolt Size

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Old May 18, 2005 | 09:18 AM
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From: Atlanta GA
Default Throttle Body Bolt Size

Hello All,

A couple years ago I installed a Helix Throttle Body Plenum spacer on my 1989 L98. I'm really not convinced that it does anything (a topic to be debated at a later date) so I'd like to remove it and just mate the stock throttle body to the plenum. Problem is, I can't find the stock throttle body bolts and the one's that I'm using now are 1" too long.

Does anyone know the length, diameter and threadcount for the original stock throttle body bolts? I'm hoping I can find them at Home Depot.
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Old May 20, 2005 | 01:44 PM
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Anybody have this?
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Old May 20, 2005 | 05:17 PM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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All four bolts are M8x70mm

I forget the thread pitch, but there's only one. (1.5 mm i think?)
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Old May 20, 2005 | 05:25 PM
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I believe they're 8x1.25...
-Jeb
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Old May 24, 2005 | 08:46 AM
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Thanks for all of your help with this guys!!

Just what I needed!
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