Cummins Silicone Radiator Hose Kit: Which One Fits Your Ram?

The right radiator hose kit depends on your Ram’s year, engine and cooling-system configuration. Mammoth offers silicone upper and lower radiator hose kits across the 1994–2026 Cummins range, but two years need extra attention: 1998 and 2010.

Start with the chart below, then read the notes for your truck before ordering. If your hoses or radiator have been changed from the original setup, compare the existing parts with the kit rather than relying on model year alone.

Find the radiator hose kit for your year

These listings cover Ram 2500 and 3500 applications. Do not assume that a kit also fits a cab-and-chassis truck, 4500 or 5500. Contact us before ordering for those applications.

The seven kits have black, blue and red options. Check the product page for current availability, or browse the Cummins coolant hose collection.

Buying for a 1998 truck

For a 1998 Ram, confirm whether you have the 12-valve or 24-valve 5.9L engine before selecting a hose kit.

The 1998.5–2002 kit is specifically for the 24-valve engine. It does not fit the 12-valve. The shorter “98–02” wording in its web address should not be taken to mean every 1998 truck.

If yours is a 1998 12-valve, contact us before ordering the earlier kit. Its listing names 1994–1997, so we want to confirm your application rather than have you choose from the year alone.

Send your year, engine information and VIN, along with clear photos of the existing upper and lower hoses. A door-label build date can provide useful information, but it should not be your only fitment check.

Buying for a 2010 truck

Two kit listings include 2010, and they are not interchangeable simply because the year appears in both titles.

The 2003–2010 kit limits 2010 fitment to the earlier, third-generation configuration. Its listing specifically notes that the newer fourth-generation configuration has a different-sized radiator.

The 2010–2012 kit is the listing to review for the newer configuration.

If you are unsure which applies, contact us with your VIN and photos of the radiator connections and existing hoses. Confirm the actual cooling-system layout before ordering, especially if the radiator or engine has been replaced.

What comes in the kits

All seven kits are described as upper and lower radiator hose sets. They should not be treated as replacements for every hose in the cooling system. Heater hoses, overflow lines and other smaller connections may be separate parts.

The 2010–2012, 2013–2014, 2015–2018 and 2019–2026 kit descriptions also list stainless steel clamps and hardware. For the earlier kits, check with us if clamp inclusion is important to your order. Do not assume that every kit has the same clamp quantity or type.

The published construction and temperature details differ by kit:

• 1994–1997, 1998.5–2002 and 2003–2010: reinforced silicone hose with a stated maximum temperature of 350°F.
• 2010–2012, 2013–2014, 2015–2018 and 2019–2026: stated 4-ply construction.

Use the specifications for the exact coolant kit you are buying. An intercooler boot’s boost-pressure rating is not a cooling-system operating specification, and a hose temperature rating does not change your truck’s recommended operating temperature.

Silicone or replacement rubber

Silicone is an option when replacing worn radiator hoses, particularly when heat resistance is a priority. It still needs the right fit, suitable clamps and correct installation. Inspect silicone hoses during routine maintenance just as you would inspect rubber hoses.

For a closer comparison, read silicone vs rubber radiator hoses. If you are still diagnosing a leak, start with the signs of a bad radiator hose before ordering parts.

Before installing a new hose kit

• Let the engine cool completely. Do not open a hot, pressurized cooling system.
• Compare the parts before removing the old hoses. Check the hose shape, connections and listed application.
• Use the correct clamps and tightening instructions. Follow the instructions for the specific hose and clamp. Do not borrow a torque figure from a different clamp design.
• Use the coolant specified for your truck. Follow the vehicle’s service procedure for filling and removing trapped air, then check for leaks.

If you need separate clamps, our hose clamp size guide explains how to measure the installed hose. Fitment and clamp suitability matter as much as the diameter.

Need intercooler boots too?

Radiator hoses carry coolant; intercooler boots connect the charge-air piping. Make sure you are ordering for the system you are repairing.

Our 5.9 Cummins intercooler boot guide and 6.7 Cummins intercooler boot guide cover the boot kits by year. Some applications also have a combo kit. Review the individual listing for fitment, contents and current availability.

Common questions

Does the 2003–2010 kit fit a 2007.5–2009 6.7 Cummins?

Yes. The listing covers both 5.9L and 6.7L Ram 2500/3500 applications within its stated years. The special radiator-configuration note applies to 2010.

Does the 2019–2026 kit include 2026 trucks?

Yes. The product listing includes 2026 Ram 2500 and 3500 with the 6.7L Cummins. Confirm your application against that listing before ordering.

Can I buy a kit using model year alone?

Start with the year, then check the engine and product’s fitment notes. Pay particular attention to 1998 and 2010. Modified cooling systems and cab-and-chassis applications need an additional check.

Is there a warranty?

Mammoth parts are covered by our Lifetime Limited Warranty. Read the policy for eligibility, coverage and exclusions.

When will my order ship?

Orders placed before 12 PM Eastern, Monday–Friday, usually dispatch the same business day. Weekend and federal-holiday orders ship the following business day. See our shipping policy for details.

Ready to choose your kit? Browse the Cummins coolant hose collection. If anything about your truck’s fitment is unclear, contact us before ordering.