Originally Posted by doghound93
I have heard they relay only give torque
They do nothing when installed under a modern air-only throttle body except make the air flow path longer. They don't add HP, they don't add torque, they don't add mpg, they don't do a thing.
The only thing a throttle body spacer does for the owner of any vehicle with a modern throttle body is add $$$ to the bank accounts of their dealers & manufacturers.