Mishimoto MMCP-2.5HPRD Hump Hose Coupler, 2.5", Red Length: 3" Thickness: 4mm ID: 2.5" OD: 3.3" Hump OD: 3.3" 100% silicone construction Heat-resistant embedded fibers High heat and pressure tolerances Mishimoto Lifetime Warranty Inlet / Outlet inner diameter: 2.5 inches Inlet / Outlet outer diameter: 2.8 inches Hump outer diameter: 3.3 inches Length: 3.0 inches Thickness: 4 millimeter