Mishimoto Black Silicone Radiator Coolant Hose Kit: Jeep Wrangler 2018-2021

Mishimoto Silicone Radiator Coolant Hose Kit

2018–2021 Jeep Wrangler 2.0L JL

MMHOSE-JLH-18BK

Overview:

The Mishimoto Black Silicone Radiator Coolant Hose Kit is engineered specifically for the 2018 to 2021 Jeep Wrangler JL with the 2.0L engine. Designed to replace the stock rubber and plastic radiator hoses, this kit addresses the complexity of the JL’s cooling system, which manages coolant flow for the engine, battery system, and charge air cooler. By upgrading to Mishimoto’s premium silicone hoses, Jeep owners can ensure reliable coolant containment, improved durability, and enhanced longevity under demanding driving conditions.

This hose kit is ideal for Jeep Wrangler enthusiasts seeking a direct-fit, high-quality replacement that withstands heat and pressure better than factory components. Whether you’re tackling daily driving or off-road adventures, these hoses provide peace of mind with a lifetime warranty backing their performance.

Key Features:

Engineered for durability and reliability, the Mishimoto Silicone Radiator Coolant Hose Kit offers several key advantages over stock hoses:

• Constructed from four layers of high-grade silicone and heat-resistant fibers for superior strength and flexibility
• One-piece lower radiator hose design eliminates the plastic connector found on stock hoses, reducing potential failure points
• CNC-machined aluminum barb and mounting plate replace fragile plastic components for enhanced longevity
• Direct-fit design ensures easy installation without modifications for 2018–2021 Jeep Wrangler JL 2.0L models
• Available in black, providing a sleek, OEM-plus appearance that complements the engine bay
• Resistant to heat, pressure, and coolant chemicals for long-lasting performance
• Backed by Mishimoto’s Lifetime Warranty for confidence and peace of mind

Construction & Design:

The Mishimoto hose kit is built using a multi-layer silicone construction that combines flexibility with exceptional durability. Four layers of premium silicone material are reinforced with heat-resistant fibers to withstand the demanding thermal environment of the Jeep Wrangler’s engine bay. This design resists cracking, swelling, and degradation common with factory rubber hoses over time.

The lower radiator hose features a one-piece design that removes the weak plastic connector found on stock hoses. Instead, it incorporates a CNC-machined aluminum barb and mounting plate, providing a robust and corrosion-resistant connection point. This upgrade significantly reduces the risk of leaks and hose failure, especially under off-road or high-stress conditions.

Installation & Fitment:

Installation of the Mishimoto Silicone Radiator Coolant Hose Kit is straightforward and designed to be a direct replacement for the factory hoses. No special tools or modifications are required, and the entire kit can typically be installed in about one hour. This makes it an excellent upgrade for DIY enthusiasts and professional installers alike.

The kit fits a wide range of 2018 to 2021 Jeep Wrangler JL models equipped with the 2.0L engine, including Sport, Sport S, Rubicon, Sahara, Willys, and several special editions such as the 80th Anniversary, Freedom, Islander, Moab, High Altitude, and 4xe variants.

What's Included:

• Upper radiator hose (silicone)
• Lower radiator hose (one-piece silicone with CNC-machined aluminum barb and mounting plate)
• All necessary clamps and hardware for installation
• Detailed installation instructions

Ideal For:

This Mishimoto Silicone Radiator Coolant Hose Kit is perfect for Jeep Wrangler JL owners who want to upgrade their cooling system components for improved reliability and longevity. It is especially suited for those who frequently drive in harsh environments, off-road conditions, or who simply want a more durable and visually appealing alternative to the stock radiator hoses. The kit is also an excellent preventative maintenance upgrade to avoid common hose failures associated with aging rubber components.