EVIL ENERGY Upper Coolant Hose Kit for 2017-2019 L5P Duramax 6.6L, Aluminum

The EVIL ENERGY Upper Coolant Hose Kit replaces the factory rubber upper radiator hose on specific diesel trucks with a rigid aluminum pipe setup. Designed for 2017 to 2019 Chevrolet Silverado and GMC Sierra HD models equipped with the 6.6L L5P Duramax engine, this upgrade replaces OE part number 84094878 to deliver a sturdier cooling connection and a cleaner under-hood look.

Installation is straightforward because the aluminum pipe follows the factory routing path exactly. You do not need to cut or modify any surrounding components to get it to fit. The kit also provides everything required for the swap, including the aluminum pipe, 5-ply silicone couplers, and matching T-bolt clamps to ensure a tight, dependable seal.

The primary benefit of this setup is swapping out flexible stock rubber for a rigid aluminum pipe and reinforced silicone couplers. This configuration delivers a more finished, performance-oriented look inside the engine bay while handling the demands of daily driving and engine builds.

One limitation is vehicle compatibility. This kit is built strictly for the 2017 to 2019 6.6L L5P Duramax platform, so it will not work on other truck years or engine configurations. It is also limited to the upper radiator hose connection rather than providing a full cooling system overhaul.

Verdict: This upper coolant kit is an ideal replacement for 2017-2019 L5P Duramax owners wanting a direct-fit aluminum upgrade that cleans up the engine bay and includes all necessary mounting hardware.

A great fit if you:

• Drive a 2017-2019 Silverado or Sierra 2500HD/3500HD with the 6.6L L5P Duramax
• Want to replace the stock rubber upper hose with a cleaner aluminum tube setup
• Need a direct-fit replacement that requires no cutting or custom modifications
• Want a complete kit that includes 5-ply silicone couplers and T-bolt clamps

Consider something else if you:

• Own a truck from a different model year or with a non-L5P engine
• Need a complete cooling hose replacement set for both upper and lower lines

Which vehicles are compatible with this coolant pipe kit?
It fits 2017-2019 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD models with the 6.6L L5P Duramax diesel engine, replacing OE part number 84094878.

Does this kit require any cutting or vehicle modifications?
No, the aluminum pipe follows the original factory routing path for a direct-fit installation without any cutting or modifications.

What hardware is included in the package?
The kit comes complete with the aluminum upper coolant pipe, 5-ply silicone couplers, and T-bolt clamps.