Chevrolet Silverado 3500 HD Radiator Coolant Hose - Mishimoto - Silicone, 6.6L Duramax - Blue - 2015. This Mishimoto silicone coolant hose kit is a direct-fit upgrade for 6.6L Duramax-equipped Silverado trucks (fits 2011–2016 applications, listed here for the 2015 3500 HD) and replaces aging factory rubber lines with high-quality silicone construction.

Built for enthusiasts who run stock or modified engines, the Mishimoto hose kit uses high-grade silicone with five layers of heat-resistant embedded fibers to withstand higher temperatures and pressure over OEM hoses. CNC-machined billet couplers provide a factory-style quick-disconnect installation with no cutting required, and included T-bolt clamps ensure a secure seal. The kit is available in blue to match common performance components and pairs well with Mishimoto’s 6.6L Duramax aluminum radiator for a durable cooling system upgrade. Mishimoto supplies a lifetime warranty on these hoses.

Features

• High-grade silicone construction with five-layer heat-resistant reinforcement
• Billet 6061 aluminum CNC-machined coupler for lower radiator hose connection
• Factory-style quick-disconnect ends — no cutting required
• T-bolt clamps included for secure installation
• Fits Chevrolet/GMC 6.6L Duramax 2011–2016; offered in blue (also available in black and red)

If you have questions or need help confirming fitment, call us directly — we’re happy to help: 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations offering installation and customization services in Austin, Texas and the Los Angeles, California area. If you’re considering multiple items, contact us for shipping discounts. We install on premises at both locations.

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