Wehrli 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Features:

• Fits 2011–2016 Silverado and Sierra LML Duramax
• Replaces OEM rubber upper coolant hose
• Durable aluminum pipe for improved reliability
• Includes silicone boots and T-bolt clamps
• Comes powder coated in your color of choice
• Compatible with OEM GM radiator only
• Offers cleaner, upgraded engine bay appearance
• Resistant to heat, pressure, and wear
• Easy bolt-on installation with included hardware
• Designed for long-lasting cooling system performance
• Improves durability over factory rubber components
• Precision bent for proper engine bay fitment

Upgrade Your Cooling System With A Cleaner Custom Look

If you're looking to ditch the factory rubber hose and give your Duramax engine bay a cleaner, stronger upgrade, the Wehrli 100696 Upper Coolant Pipe Kit is a perfect solution. Designed for 2011 to 2016 Silverado and Sierra 2500HD and 3500HD trucks with the 6.6L LML Duramax, this upper pipe not only adds durability but gives your cooling system a custom touch. The powder coated aluminum pipe looks great and holds up under heat and pressure far better than the factory rubber alternative. Whether you're refreshing worn components or just dialing in the aesthetics under the hood, this kit offers both form and function. Installation is straightforward thanks to the included silicone boots and heavy-duty T-bolt clamps, making it a smart weekend upgrade. You get to choose your color, giving the engine bay a personalized finish that stands out without being over the top. For owners who take pride in performance and presentation, this is one of those simple changes that makes a big visual and functional impact.

Precision Fit And High Temperature Performance Where It Matters

The Wehrli 100696 Upper Coolant Pipe Kit is engineered to replace the OEM rubber hose with a robust aluminum upgrade for 2011–2016 LML Duramax-equipped trucks. The included upper coolant pipe is precision bent to ensure proper routing and clearance, reducing the risk of rubbing or collapse under high pressure. The use of aluminum over rubber adds resistance to heat cycling and swelling, both common causes of early hose failure. This upgrade is especially beneficial for trucks running hotter under load, such as those towing or tuned for extra performance. The kit includes high-quality silicone boots and T-bolt clamps to provide a leak-free seal and long-term reliability under varying operating conditions. It's designed specifically for use with the OEM GM radiator, ensuring exact fitment without modifications. While it may not align perfectly with some aftermarket radiators, it is a direct bolt-on solution for stock systems. Whether you're upgrading for durability, efficiency, or appearance, this kit delivers a balanced solution that performs as good as it looks.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Replaces OEM rubber upper coolant hose with durable aluminum
• Designed for use with 2011–2016 LML Duramax engines
• Includes powder coated pipe, silicone boots, and T-bolt clamps
• Powder coating available in color of your choice
• Compatible with OEM GM radiator only
• Some aftermarket radiators may cause fitment issues
• Improves durability and appearance over stock components
• Ideal for performance builds or engine bay dress-up
• Not recommended for use with non-OEM cooling systems