Mishimoto Toyota Supra heater hoses are made with a dual layer combining high grade silicone and heat-resistant embedded fibers to provide efficient heat reduction and increased pressure tolerance, all designed and engineered for a direct OEM fit.Direct fit for the 1986-1992 Toyota SupraINNER DIAMETER: 1.34" OUTER DIAMETER: 1.73"Maximum Temperature: 330°FConstructed with high grade silicone and heat-resistant embedded fibersMishimoto Lifetime Warranty