Mishimoto MMHOSE-WRX-15ABBL Subaru WRX Silicone Airbox Hose Kit, 2015+, Blue Direct fit for the 2015+ Subaru WRX INNER DIAMETER: Hose 1: 2.77" & 3.15", Hose 2: 2.78" & 2.97" OUTER DIAMETER: Hose 1: 3.16" & 3.54", Hose 2: 3.17" & 3.37" Wire-reinforced to prevent collapsing under pressure Mishimoto Lifetime Warranty