3 - Ply Reinforced Black Silicone Constructed of 3 - ply reinforced silicone, this torque boost tube is resistant to cracking and hi - temp conditions. With a smooth interior surface, this torque booster tube is engineered to increase HP, Torque air flow by reducing turbulence.Hassle - Free Installation This torque booster tube connects the billet 3 - angle adaptor on the Stage - 1 system to the intake manifold. With two stainless steel clamps, this part is a quick and easy bolt - on, requiring no cutting or drilling on OEM parts for hassle - free installation.