Performance Throttle Body Spacer by House of Billet Fits 05+ Scion tC / 08+ Scion xB (2AZFE Engine) A BRAND NEW product from House of Billet!! The H.O.B. performance throttle body spacer is a inexpensive way of gaining reliable mid-range power, torque and fuel efficiency. As the intake air passes through the spacer, the "shark bite" streamlines the airflow, creating more combustion and a more efficiently burning engine. The results are improved drivability, power and increased fuel efficiency. A 3-5hp increase and 5-6lbs of torque increase was recorded on a fully stock 2007 Scion tC (auto trans). In addition, a fuel increase of 3mpg was also noted! If you are looking to gain a few extra horses under the hood and save some gas at the same time, then this is the product for you!! Especially with the price of gas at over $5.00 per gallon!!! - All hardware and instructions are included with each purchase *Works great in combination with the House of Billet lightened crank pulley. Purchase these together and save even MORE money! Available from the drop-down menu. *You can also choose a polished or black anodized finish!! FREE SHIPPING!!! FREE SHIPPING!!! FREE SHIPPING!!!