Has anyone tried the performance chips for their RX 350?Powermax brand.

 

You can pretty much assume that all so-called performance chips for these vehicles are snake oil.

 

Thanks figured as much

 

The chip is mostly likely a waste of money that may even damage your engine. Those type of OBD "performance" chips just use electrical trickery(false sensor readings) to "maybe" squeeze out few extra horsepower by leaning out the air/fuel ratio in your engine.