Chevrolet Silverado 3500 HD Radiator Coolant Hose Kit - Mishimoto - Silicone, 6.6L Duramax - Black - 2015. A direct-fit silicone coolant hose kit designed for the 6.6L Duramax platform, offering a durable replacement to OE rubber hoses for everyday driving and modified setups.

This Mishimoto kit is built from high-grade silicone with five layers of heat-resistant embedded fibers to resist higher temperatures and pressures than stock hoses. CNC-machined billet quick-disconnect ends and a 6061 aluminum coupler provide precise fitment to factory radiator connections without cutting. The kit ships with heavy-duty T-bolt clamps and is offered in black to match stock or aftermarket engine bays. It complements Mishimoto’s 6.6L Duramax aluminum performance radiator for a more durable cooling system on both stock and modified Silverado trucks.

Features

• High-grade silicone construction with five reinforced layers
• CNC-machined billet quick-disconnect ends for factory-style fit
• 6061 aluminum coupler for the lower radiator connection
• Includes T-bolt clamps for secure installation
• Compatible with 6.6L Duramax applications (see fitment guide)

Whether you’re maintaining a daily driver or upgrading a work truck, this Mishimoto hose kit reduces the risk of coolant leaks and handles higher thermal loads than OEM rubber hoses. Fitment is intended for Duramax 6.6L models; always verify compatibility with your specific year and trim before purchase.

If you have questions or need help confirming fitment, call us directly at 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations—Austin, Texas and the Los Angeles, California area—where we offer installation and customization services on premises. If you’re thinking about purchasing multiple items, contact us for possible shipping discounts. We install this product at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov