Lightweight Crank Pulley by House of Billet Fits 05+ Scion tC / 08+ Scion xB (2AZFE Engine) Lightweight crank pulleys have proven horsepower and torque increases time after time. These pullies are actually the same size as stock; however they weigh over 3lbs lighter than the OEM. By reducing rotating mass, it gives the 2AZFE engines a gain of 8-10 horsepower and an increase in torque by 10+ ft/lbs. The H.O.B. pulley is CNC machined 6061 aluminum. It includes the timing mark and it perfectly balanced for an OEM quality fit. It retains the factory belts and fits with absolutely no modifications. -Detailed instructions included with each purchase *Works great in combination with the House of Billet throttle body spacer. Purchase these together and save even MORE money! Available from the drop-down menu. FREE SHIPPING!!! FREE SHIPPING!!! FREE SHIPPING!!!