Evolution MotorSports high flow silicone turbocharger air inlet ducts have been meticulously engineered, tested and manufactured to improve performance on higher than stock power Porsche 997TT and GT2's. The design improves airflow to the VTG turbochargers which improves boost response and overall power. Through our extensive testing and development process, we have created a product that out performs the OEM plastic ducts both in our theoretical flow testing as well as in real world performance validation tests.