Description
The Mishimoto 6.6L Duramax Silicone Coolant Hose Kit (MMHOSE-DMAX-11BL) is a blue, direct-fit replacement hose kit built specifically for GM’s 6.6L Duramax-powered heavy-duty trucks. It pairs a CNC-machined 6061 aluminum coupler with five-layer, heat-resistant silicone hose construction and billet CNC’ed quick disconnect ends, so it bolts into the factory cooling system with no cutting required.
A failing or leaking coolant hose can put your engine at risk, and this Mishimoto kit is engineered as a durable, performance-grade upgrade over the factory rubber hose. Built from high-grade silicone with five layers of embedded heat-resistant fibers, it’s rated to handle increased pressure and temperature in the cooling system, making it suitable for stock and modified trucks alike. The included T-bolt and worm-gear clamps make installation straightforward, and because this hose kit is designed as a specific, direct-fit part rather than a universal hose, it mates cleanly to the factory radiator connection. It’s also engineered to complement the Mishimoto 6.6L Duramax Aluminum Performance Radiator for a matched cooling setup, and it’s backed by the Mishimoto Lifetime Warranty. This particular kit ships in blue; black and red versions are also offered.
Vehicle Applications
This Mishimoto silicone coolant hose kit is a specific fit for 2011–2015 Chevrolet Express 2500 and Express 3500 Base models, and for 2011–2016 Chevrolet Silverado 2500 HD and 3500 HD trucks in LT, LTZ, and WT trims (with High Country trim covered for 2015–2016). On the GMC side, it fits 2011–2016 Sierra 2500 HD and 3500 HD Denali, SLE, and SLT trims, 2011–2014 Sierra 2500 HD and 3500 HD WT trims, and 2015–2016 Sierra 2500 HD and 3500 HD Base trims.
Features
- Five layers of heat-resistant embedded fibers and silicone for increased pressure and temperature tolerance
- 6061 aluminum CNC-machined coupler mates the lower radiator hose to the factory radiator
- Billet CNC’ed quick disconnect ends for direct factory fitment with no cutting required
- T-bolt and worm-gear clamps included for straightforward installation
- Specific, direct-fit design engineered for stock or modified trucks
- Offered in black, blue, or red color options
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMHOSE-DMAX-11BL
- Product Type: Cooling
- Hose Material: Silicone
- Hose Color: Blue
- Maximum Temperature Rating: 330°F
- Clamps Included: Yes
- Grade Type: Performance
- Fit Type: Specific (direct fit, not universal)
- Kit Includes: (2) Silicone Hoses, (1) CNC Aluminum Coupler, (4) T-Bolt Clamps, (2) Worm-Gear Clamps, Mishimoto Lifetime Warranty
Frequently Asked Questions
What is included in the Mishimoto 6.6L Duramax Silicone Coolant Hose Kit?
The kit includes (2) silicone hoses, (1) CNC aluminum coupler, (4) T-bolt clamps, (2) worm-gear clamps, and the Mishimoto Lifetime Warranty.
What vehicles does this coolant hose kit fit?
It is a specific fit for 2011–2015 Chevrolet Express 2500/3500 Base, 2011–2016 Chevrolet Silverado 2500 HD/3500 HD (LT, LTZ, WT, with High Country covered 2015–2016), 2011–2016 GMC Sierra 2500 HD/3500 HD Denali, SLE, and SLT, 2011–2014 Sierra 2500 HD/3500 HD WT, and 2015–2016 Sierra 2500 HD/3500 HD Base.
What color is this hose kit?
This kit is offered in blue, as well as black and red color options.
What is the maximum temperature rating of this hose kit?
The silicone hoses carry a maximum temperature rating of 330°F.
Does installing this hose kit require cutting the factory hoses?
No. The kit uses billet CNC’ed quick disconnect ends for direct factory fitment with no cutting required.
Is this a universal coolant hose kit?
No, it is a specific fit part designed as a direct replacement rather than a universal hose kit.
⚠ WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
