The Mishimoto BMW E36 (325/328/M3) with 3.5" HFM Silicone Intake Boot is made from a combination of high-grade silicone and heat-resistant embedded fibers for a high-quality replacement kit for your OEM rubber hoses. Available in black, blue or red, Mishimoto silicone hoses retain OEM fitment while providing increased pressure tolerance for the ultimate upgrade in performance and style.Direct fit for 1992-1999 BMW E36 (325/328/M3)INNER DIAMETER: 2.90" & 3.50" OUTER DIAMETER: 3.30" & 3.90"Maximum Temperature: 330°FConstructed with high grade silicone and heat-resistant embedded fibersMishimoto Lifetime Warranty