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Old 02-05-2014, 01:58 PM   #3
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Drives: BMW E92 M3 ZCP
Join Date: Jan 2014
Location: Miami Shores
Posts: 31
Originally Posted by Apex Chase View Post
The VMAX ported throttle bodies are stock GM throttle bodies that have had a porting service performed. The throttle body itself is a GM part. That spot is where the molten aluminum is poured into the cast when it is manufactured. Some are a little cleaner than others but they all have some sort of marking in that spot.

How about the cracks in the casting ?
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