Throttle Body Spacer

[Planohummer]

TB spacer will slightly increase upper rpm HP and slightly decrease lower rpm HP. It's more of a psychological effect than anything. Basically, you're moving the power band up slightly(have I said slightly enough?). Past that, don't look for a noticeable increase in performance.
General rule--the more you spend, the faster you go. In the scheme of things, $100 is only the ante.