Whats this orange o ring from?
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The Best V8 Stories One Small Block at Time
It looks like it is an extra one. Did you replace the IAC or the TPS? If so it is probly the original one and it must of fell off when you pulled the part out of the TB, and the new part came with one. But I like my first answer best, muffler defibulator oring. Have you started the car yet to check for any leeks?






