Mishimoto MMHOSE-E36-92IBRD BMW E36 (325/328/M3) Silicone Intake Boot, 1992-1999, Red Direct fit for 19921999 BMW E36 (325/328/M3) INNER DIAMETER: 2.90" & 3.10" OUTER DIAMETER: 3.30" & 3.50" Maximum Temperature: 330F Constructed with high grade silicone and heat-resistant embedded fibers Mishimoto Lifetime Warranty