Torque Solution Turbo Inlet Hose for the Subaru WRX 2015+. Our silicone inlet hose smooths the air entering the turbo by replacing the restrictive OEM corrugated inlet hose. We also increased the overall ID from 2.7" on the OEM to 3" on our inlet tube allowing for a larger volume of air feeding your turbo. Our inlet hose is made from 5 ply high grade silicone and wire reinforced to prevent collapsing under high pressure.