Upper Coolant Pipe for 2011-2016 LML 6.6L Duramax Radiator Pipe | SPELAB

FAQS

Why should I upgrade my 2011-2016 LML Duramax to an aluminum upper coolant tube?

The factory upper radiator hose on LML engines uses failure-prone plastic and rubber components. SPELAB's 6061-T6 aluminum tube eliminates these OEM weaknesses, providing superior durability and reliability under heavy load or tuned conditions.

Is this kit compatible with Silverado and Sierra 2500HD/3500HD trucks?

Yes, this kit is specifically engineered for 2011-2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L LML Duramax Diesel engine.

Does the SPELAB LML coolant pipe require any modifications for installation?

No, this is a direct bolt-on replacement. It utilizes CNC-machined thermostat housing and radiator adapters to ensure a perfect, leak-free fit without any cutting or fabrication required.

What are the benefits of the mandrel-bent aluminum construction?

Mandrel-bent aluminum tubing maintains a consistent diameter throughout bends, which reduces flow resistance and withstands heat and pressure far better than standard rubber hoses, helping to prevent major engine failures.

Can this modification help reduce engine operating temperatures?

Yes, by replacing the restrictive factory hose with high-grade aluminum tubing, this modification can help improve cooling efficiency and potentially reduce engine operating temperatures by approximately 20–25°F (11–14°C) under heavy use.