Review on Boost Performance with Airaid 300-637 PowerAid Throttle Body Spacer by Lawrence Reuter

Improved fuel economy by approximately 2mpg after installation. It was very easy to install and not intimidating at all. It has definitely improved my engine's performance, especially for what it is (remember it's just a spacer, not a supercharger or anything crazy). I do hear the "whistle" that people say is part of it, but personally it doesn't bother me and I think it makes the engine sound like it's running smoother. I will definitely buy again and recommend this great easy upgrade