Mishimoto has developed a silicone transition coupler that measures 3.5" to 4". Available in black, blue, and red. Silicone hoses are a great upgrade from your OEM rubber hoses because they can withstand more pressure and can hold up to more heat cycles. Once you replace your rubber hoses with some quality silicone hoses, you shouldn't have to replace them again. Features 100% silicone construction Heat-resistant embedded fibers High heat and pressure tolerances Mishimoto Lifetime Warranty.
