Mishimoto MMCP-25275BL 2.5" to 2.75" Silicone Transition Coupler, Blue Length: 3 Thickness: 4mm ID: 2.5 OD: 2.75 ID: 2.8" OD: 3.0 100% silicone construction Heat-resistant embedded fibers High heat and pressure tolerances Mishimoto Lifetime Warranty