Mishimoto Silicone Radiator Hose Kit

2015–2018 Ram 2500 / 3500 6.7L Diesel

Part #: MMHOSE-RAM-15RD

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 high-quality silicone hoses engineered to endure extreme heat, pressure, and demanding operating conditions. Whether you tow heavy loads, drive off-road, or use your truck for daily commuting, Mishimoto’s silicone hoses deliver enhanced durability and reliability to keep your engine running cooler and safer.

Ideal for both stock and modified Cummins trucks, this kit improves coolant flow and reduces the risk of overheating during intense use. Backed by Mishimoto’s industry-leading Lifetime Warranty, it provides long-term confidence and superior performance for your cooling system.

Key Features

Engineered for durability and performance, the Mishimoto Silicone Radiator Hose Kit offers the following key benefits:

• Constructed from premium 4-ply silicone reinforced with embedded heat-resistant fibers for exceptional thermal and pressure resistance
• Includes both upper and lower radiator hoses to fully replace factory rubber components
• Lower hose features an internal spring coil to prevent collapse under vacuum conditions, ensuring consistent coolant flow
• Available in vibrant red to add a custom look to your engine bay, with other color options available separately
• Resistant to cracking, swelling, and degradation common with OEM rubber hoses over time
• Precision-molded for exact fitment on 2015–2018 Ram 2500 and 3500 6.7L Cummins engines
• Improves cooling system reliability during heavy-duty towing and high-temperature operation
• Backed by Mishimoto’s Lifetime Warranty for long-term peace of mind

Construction & Design

The Mishimoto radiator hoses are expertly crafted from high-grade 4-ply silicone, reinforced with embedded heat-resistant fibers to provide superior strength, flexibility, and durability compared to standard rubber hoses. This multi-layer construction ensures excellent resistance to the high temperatures and pressure fluctuations typical of diesel engine cooling systems.

The lower radiator hose includes an internal spring coil that maintains hose shape and prevents collapse under vacuum, a critical feature that ensures consistent coolant flow and prevents overheating. Each hose is precision-molded to match the exact contours and fitment of the factory hoses, allowing for a seamless, leak-free installation.

Installation & Fitment

Installation is straightforward thanks to the direct-fit design tailored specifically for 2015–2018 Ram 2500 and Ram 3500 trucks with the 6.7L Cummins engine. This kit replaces the factory upper and lower radiator hoses without requiring any modifications or additional adapters. Standard hand tools are sufficient, making it accessible for both experienced DIY enthusiasts and professional mechanics.

Always ensure the cooling system is fully drained and cooled before beginning installation to avoid injury or damage. Follow Mishimoto’s detailed instructions for optimal results and hose longevity.

What's Included

• Upper silicone radiator hose
• Lower silicone radiator hose with internal spring coil
• All necessary clamps and hardware for installation
• Installation instructions

Ideal For

This silicone radiator hose kit is perfect for Ram 2500 and 3500 owners who demand enhanced cooling system durability and reliability. It is especially suited for:

• Owners upgrading or modifying their 6.7L Cummins diesel engines
• Drivers frequently towing heavy loads or operating in high-temperature environments
• Off-road enthusiasts seeking robust and reliable cooling components
• Anyone looking to replace aging, cracked, or leaking factory radiator hoses with a long-lasting, high-performance solution

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.