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o2 chips really work?

574 Views 3 Replies 4 Participants Last post by  mlbbaseball
I just purchased a "stage 3 o2 sensor chip" from (u can find it on there easily) do these acctually work? Or did I just waste my money?
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10:1 says its just a resistor

20:1 says eventually it messes w/ ur engine negatively!!!

100:1 says u'll be severly dissapointed

100000000000000000000000000000000000000:1 you wasted ur money!!!
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