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I bought the Poweraid Throttle Body Spacer (by Airaid) and noticed a much better acceleration at midrange. Claims to add 10-12 horses. It pickups nicely and due to the design of it (corkscrew effect inside the bore), it creates a nice noticeable whistle from the 28% pedal position on up (using Advanced EVIC). Now, the questions...first, does anybody know the actual horsepower gains from a throttle body spacer (approximate) and what are your thoughts on Throttle Body Spacers. Do many of you use them?