If i have ever see a crock of !Removed! it is those pieces of crap ,it is a 3 cent resistor in a box. It makes the engine run richer thinking it has more air ingested.
Get a aem or greddy unit to properly do the same thing but according to load ,speed and other factors to make it work properly, BTW it will not work on 90% of modern Toyota's as they have self learning sensors and ecu's which change the values according to t what the sensor reads. So it stays in spec longer to changing environments.
btw read the feedback where they even say it is a resistor they were sent and it sucks by more than a few people