Mishimoto Silicone Radiator Hose Kit

Ram 2500 / 3500 15-18 6.7L Diesel/6.4L/5.7L

Part #: MMHOSE-RAM-15BL

Overview

The Mishimoto Silicone Radiator Hose Kit is a premium cooling system upgrade designed specifically for 2015 to 2018 Ram 2500 and Ram 3500 trucks equipped with the 6.7L Cummins diesel engine. This kit replaces the factory rubber radiator hoses with durable, high-quality silicone hoses engineered to withstand extreme heat, pressure, and demanding operating conditions. Whether you drive a stock or modified Cummins-powered Ram, this hose kit enhances coolant flow reliability and helps maintain optimal engine temperatures during heavy-duty towing, off-road use, or daily driving.

Built to last and backed by Mishimoto’s industry-leading lifetime warranty, this direct-fit hose kit offers a hassle-free installation and a long-term solution to common radiator hose failures. It also adds a clean, professional appearance with vibrant blue silicone hoses that resist cracking, swelling, and degradation far better than OEM rubber components.

Key Features

Engineered for durability and performance, the Mishimoto Silicone Radiator Hose Kit delivers:

• Constructed from high-grade 4-ply silicone reinforced with heat-resistant fibers for exceptional thermal and pressure tolerance
• Includes both upper and lower main radiator hoses for a complete cooling system upgrade
• Internal spring reinforcement in the lower hose prevents collapse under vacuum conditions, ensuring consistent coolant flow
• Far more resistant to cracking, swelling, and chemical degradation compared to factory rubber hoses
• Direct-fit design for easy installation with no cutting or modifications required
• Available in vibrant blue to enhance engine bay aesthetics
• Resistant to oil, chemicals, and environmental contaminants for extended service life
• Backed by Mishimoto’s lifetime warranty for long-term peace of mind

Construction & Design

The Mishimoto Silicone Radiator Hose Kit is crafted from premium 4-ply silicone material reinforced with embedded heat-resistant fibers, providing superior strength, flexibility, and durability. This advanced construction allows the hoses to endure the extreme temperatures and high-pressure environments typical of heavy-duty diesel engines like the 6.7L Cummins.

The lower radiator hose features an internal spring coil that prevents hose collapse during rapid coolant flow changes or vacuum conditions, improving upon the factory design to maintain consistent coolant circulation. Each hose is precision-molded to match the exact contours and dimensions of the 2015–2018 Ram 2500 and 3500 radiator connections, ensuring a secure, leak-free fit without the need for modifications.

Installation & Fitment

Installation of the Mishimoto Silicone Radiator Hose Kit is straightforward and designed as a direct replacement for the factory upper and lower radiator hoses. No cutting, trimming, or additional modifications are necessary, making it suitable for both DIY enthusiasts and professional installers. Standard hand tools are sufficient to remove the original hoses and install the Mishimoto kit.

This kit fits the following Ram models equipped with the 6.7L Cummins engine:

• Ram 2500 Big Horn (2015–2018)
• Ram 2500 Laramie (2015–2018)
• Ram 2500 Laramie Limited (2015)
• Ram 2500 Laramie Longhorn (2015–2018)
• Ram 2500 Limited (2016–2018)
• Ram 2500 Lone Star (2015)
• Ram 2500 Outdoorsman (2015–2016)
• Ram 2500 Power Wagon (2015–2018)
• Ram 2500 SLT (2015–2018)
• Ram 2500 Tradesman (2015–2018)
• Ram 3500 Big Horn (2015–2018)
• Ram 3500 Laramie (2015–2018)
• Ram 3500 Laramie Limited (2015)
• Ram 3500 Laramie Longhorn (2015–2018)
• Ram 3500 Limited (2016–2018)
• Ram 3500 Lone Star (2015, 2017)
• Ram 3500 SLT (2015–2018)
• Ram 3500 Tradesman (2015–2018)

Always ensure the engine is cool before beginning installation to avoid injury.

What's Included

• Upper radiator hose (100% silicone)
• Lower radiator hose with internal spring reinforcement (100% silicone)
• Installation instructions

Ideal For

This Mishimoto Silicone Radiator Hose Kit is ideal for Ram 2500 and 3500 owners who demand enhanced cooling system reliability and durability. It is especially beneficial for:

• Owners with modified or high-performance 6.7L Cummins engines
• Drivers operating in extreme temperature or heavy-duty towing conditions
• Anyone seeking a long-lasting upgrade over factory rubber hoses
• Enthusiasts who want a clean, professional engine bay appearance with color-matched hoses

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.