3in Red Silicone Airbox Hose (MMHOSE-WRX-AM7RD) by Mishimoto. Includes: Silicone Hose. Inner Diameter: 2.90in & 2.99in. Outer Diameter: 3.30in & 3.39in. Mishimoto's Silicone Induction Hose is made from a combination of high-grade silicone and heat-resistant embedded fibers for a high-quality replacement for your OEM hose. The Silicone Induction Hose is wire reinforced to prevent collapsing under pressure and features increased flow thanks to a larger internal diameter. Available in black, blue or red, the Mishimoto silicone induction hoses retain OEM fitment, the ultimate upgrade in performance and style.