New owner here and looking to complete some basic and affordable changes. I have done a lot of reading and seem to find somewhat varied opinions on throttle body spacers. Some people complain about the whistling sound, or say it is a very marginal performance change. I found one brand in particular that touts their product as "less whistle, more performance" I guess. They claim up to 22 hp and 25 ft-lbs torque with an increase of 4 mpg....I realize that these claims are usually on the high side,