Cobb Tuning Evolution X turbo inlet hose use four ply steel-reinforced silicone, eliminating the issue of hose collapse that other inlet pipes suffer while under suction at peak demand. While the steel reinforcement provides excellent stability, the silicone allows adequate torsional flex, allowing engine movement on the OEM engine mounts under hard acceleration without risk of separation. The inlet feeds air directly to the turbocharger for increased throttle response and performance. Cobb also has inlet hoses designed specifically for Evo X's running Forced Performance turbos with 3" inlets. The bulge design increases the cross-section to 3.5" to maximize air flow delivered directly to your turbocharger, providing much more efficient power and response. All hoses reuse your factory fittings and clamps for easy installation.