Trans Dapt Throttle body spacer.These Torque-Curve MPFI spacers go a step further by conditioning the airflow, and thereby reducing turbulence for unsurpassed power gains, smoother acceleration, and better fuel economy. The result is a denser air/fuel mixture in the combustion chamber, which means more horsepower, more torque, and better fuel mileage. Plus, they feature a non-whistle design. If you have a upper strut tower brace this is a difficult install. Install was 1.5 hours because I have a strut tower brace that is really close to the air intake and with the spacer it made the install of the air intake a little difficult.