After encountering the collapse of the OEM intake air hose on Turbo engines (this typically occurs around 5000rpm) that had been re-chipped, Samco development team set about the manufacture of a hose with re-inforced walls to remedy the problem. The replacement silicone hose was also aerodynamically improved internally to maximise power by removing the existing restrictions. Suitable for Subaru Impreza WRX - STI GD/GB/GG 01-05 mod. Available in blue color.