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C4 Open Discussion General and technical C4 Corvette discussion - ownership, maintenance, repairs, modifications, tuning

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Old 05-15-2024, 6:52am   #1
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Default TPI Specialties throttle Body, 52mm

I have a TPIS throttle body. Its an OEM bored out. Never heard anything bad about them.
But, I noticed this one doesnt have an IAC hole drilled through the OEM body. I have another one from 1993, TPIS is a 94, to show the difference.
ANy idea why they dont have a hole. Same IAC and housing.
3rd pic is a OEM 1994 LT1 Z28 take off, and it has a drilled hole as well.
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