Mishimoto MMHOSE-BRZ-13IBK Silicone Induction Hose for Subaru BRZ, 2013+, Black Direct fit for 2013+ Subaru BRZ and Scion FR-S Inner Diameter: 2.95 Outer Diameter: 3.35 Max Temp: 330F Dyno-proven gains of up to 5 whp Internal metal support rings protect against high vacuum and collapse Mishimoto Lifetime Warranty