HPS Silicone Heater Hoses Kit

1999–2004 Jeep Grand Cherokee 4.7L V8

Part #: 57-1449H-BLK

Overview

The HPS Silicone Heater Hoses Kit is a premium replacement solution designed specifically for the Jeep Grand Cherokee equipped with the 4.7L V8 engine from 1999 through 2004. This kit addresses common issues associated with aging or damaged OEM heater coolant hoses, such as leaks, cracks, and collapse, which can lead to engine overheating and coolant loss. Ideal for Jeep owners seeking a durable upgrade or a reliable OEM replacement, these hoses ensure optimal coolant flow and long-term performance under demanding conditions.

Constructed from high-grade silicone, these hoses offer superior heat resistance and flexibility, maintaining their integrity even in extreme under-hood temperatures. Whether you are restoring your Jeep or upgrading for enhanced reliability, the HPS Silicone Heater Hoses Kit delivers a precise fit and lasting durability.

Key Features

Engineered for durability and performance, this heater hose kit includes several advanced features that set it apart from standard rubber hoses:

• Premium 3-ply reinforced silicone construction for high heat resistance and durability
• Precisely molded bends and curves to ensure perfect OEM fitment without modifications
• Includes 100% stainless steel non-perforated embossed hose clamps that prevent hose damage during installation
• Designed to prevent coolant leaks and engine overheating caused by cracked or collapsed OEM hoses
• Race-proven design engineered for prolonged exposure to under-hood heat and coolant temperatures
• Maximum operating temperature rating of 350°F (177°C) for reliable performance in extreme conditions
• Significantly lower water permeation rate compared to standard EPDM rubber hoses, enhancing coolant retention

Construction & Design

The hoses in this kit are crafted from high-quality silicone reinforced with a 3-ply fabric layer, providing exceptional strength and flexibility. This construction allows the hoses to withstand the harsh thermal environment of the engine bay without cracking, hardening, or collapsing over time. The silicone material also resists oil, coolant, and other automotive fluids, ensuring long-lasting service life.

Each hose is precision-engineered with the correct bends and curves to match the original equipment specifications, guaranteeing a seamless installation and optimal coolant flow. The included stainless steel clamps are embossed and non-perforated, which prevents cutting or damaging the silicone hoses during tightening, further enhancing durability and leak prevention.

Installation & Fitment

The HPS Silicone Heater Hoses Kit is designed for direct bolt-on installation on 1999 to 2004 Jeep Grand Cherokee models equipped with the 4.7L V8 engine. No modifications or special tools are required, making it a straightforward upgrade or replacement for DIY enthusiasts and professional mechanics alike. The included stainless steel clamps simplify the installation process and ensure a secure, leak-free connection.

It is important to regularly check coolant levels when using silicone hoses in daily-driven vehicles, as silicone has a higher water permeation rate compared to standard rubber hoses. Routine maintenance will help maintain optimal cooling system performance.

What's Included

• Set of high-heat resistant 3-ply reinforced silicone heater hoses with OEM-correct bends
• 100% stainless steel non-perforated embossed hose clamps for secure installation

Ideal For

This heater hose kit is perfect for Jeep Grand Cherokee owners who want to replace worn or damaged OEM heater hoses with a more durable, heat-resistant alternative. It is also well-suited for enthusiasts seeking a reliable upgrade that can withstand the rigors of daily driving, off-road use, or high-temperature engine environments. Whether restoring a classic Jeep or enhancing cooling system reliability, this kit offers a long-lasting solution engineered for performance and peace of mind.

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.