HPS Silicone Radiator & Heater Hoses Kit

1999–2004 Jeep Grand Cherokee 4.7L V8

Part #: 57-1449-BLK

Overview

The HPS Silicone Radiator & Heater Hoses Kit is a premium replacement solution designed specifically for the 1999 to 2004 Jeep Grand Cherokee equipped with the 4.7L V8 engine. This kit offers a direct-fit upgrade over OEM and aftermarket hoses, providing enhanced durability and reliability under extreme conditions. Ideal for Jeep owners seeking to prevent coolant leaks and overheating issues caused by aging or damaged factory hoses, this kit ensures optimal coolant flow and engine protection.

Constructed from high-quality silicone, these hoses withstand higher temperatures and pressures than standard rubber hoses, making them perfect for daily drivers and off-road enthusiasts alike. The kit includes all necessary components for a straightforward installation, helping maintain your vehicle’s cooling system integrity and performance.

Key Features

Engineered for durability and performance, the HPS Silicone Radiator & Heater Hoses Kit offers the following key benefits:

• Premium-grade, high-heat resistant 3-ply reinforced silicone construction
• Precisely molded with correct bends and curves for perfect OEM fitment
• Includes 100% stainless steel non-perforated embossed hose clamps that prevent hose damage during installation
• Designed to prevent and repair coolant leaks and overheating caused by cracked or collapsed OEM hoses
• Race-proven design engineered for prolonged exposure to under-hood heat and coolant temperatures
• Maximum temperature rating of 350°F (177°C) for superior heat tolerance
• Significantly lower risk of hose failure compared to standard EPDM rubber hoses
• Compatible with both radiator and heater coolant systems for comprehensive coverage

Construction & Design

The hoses in this kit are crafted from a high-quality silicone compound reinforced with three layers of durable fabric, providing exceptional strength and flexibility. This multi-ply design allows the hoses to maintain shape and resist collapsing under vacuum or pressure, ensuring consistent coolant flow. The silicone material also offers superior resistance to heat, ozone, and aging compared to traditional rubber hoses.

Each hose is precision-engineered with factory-correct bends and curves to guarantee a seamless fit without the need for modifications. The included stainless steel clamps are embossed and non-perforated, which prevents cutting into the silicone, extending the life of the hoses and maintaining a secure seal.

Installation & Fitment

This kit is designed for a direct bolt-on replacement for the 1999–2004 Jeep Grand Cherokee 4.7L V8 models, requiring no special tools or modifications. Installation is straightforward and can be completed by experienced DIYers or professional mechanics. The included stainless steel clamps simplify the process, ensuring a tight, leak-free connection. Regular inspection of coolant levels is recommended when using silicone hoses, as silicone has a higher water permeation rate than standard rubber hoses.

What's Included

• Upper radiator hose
• Lower radiator hose
• Heater coolant hoses
• 100% stainless steel non-perforated embossed hose clamps

Ideal For

This hose kit is ideal for Jeep Grand Cherokee owners who want to upgrade their cooling system with durable, high-performance components. It is especially suited for vehicles experiencing coolant leaks or overheating due to deteriorated OEM hoses. Off-road enthusiasts, daily drivers, and anyone seeking long-lasting reliability under high-heat conditions will benefit from this premium silicone hose kit.

HPS Performance specializes in high-temperature reinforced silicone hoses and related joining solutions—couplers, tubing, and clamps—built for boosted and high-heat engine bays. Used in performance and racing applications, HPS products are designed to meet demanding temperature and pressure conditions for dependable charge-air and coolant routing.