The 4.0L Jeep inline six has a reputation for being a robust powerplant capable of providing decades of reliable service. Despite its stoutness, proper maintenance and care is crucial to keeping your XJ on the road and trails. Coolant leaks can quickly escalate to a blown head gasket and/or internal engine damage. Our 1991-2001 Jeep Cherokee XJ 4.0L Silicone Radiator & Heater Hose Kit is made to Mishimoto's exacting standards and is constructed from high-grade silicone embedded with heat-resistant fibers. These silicone hoses provide increased pressure and heat tolerances while fitting like stock, making them an ideal replacement for the rubber factory hoses in your Jeep. Available in black, blue, or red, and protected by our Mishimoto Lifetime Warranty, these hoses are the perfect upgrade for any Jeep XJ owner who is looking to improve their cooling system.