Description
The Mishimoto Top Heater Hose Upgrade (MMHOSE-RAM-07HU) is a direct-fit fabrication component engineered to replace the factory quick-disconnect fitting on the heater hose of RAM 6.7L Cummins trucks built from 2007.5 through 2024. Instead of the factory’s leak-prone quick-disconnect design, this upgrade installs a stainless-steel AN adapter with an O-ring-less, -10AN push-fit connection at the engine, giving owners a more dependable seal against coolant loss.
As part of Mishimoto’s lineup of RAM 6.7L Cummins fabrication upgrades, this top heater hose fitting targets one of the more common weak points in the truck’s cooling system: the OE quick-disconnect joint. By swapping that connection for a stainless-steel elbow fitting with a -10AN push-lock end and pre-installed thread sealant, the upgrade is built for a leak-free, seamless coolant flow path. The kit is designed for easy installation and includes the hardware needed to complete the swap, making it a practical fabrication-style upgrade for Cummins owners who want a more reliable connection at this point in the cooling system.
Vehicle Applications
This heater hose upgrade covers a wide span of RAM heavy-duty trucks. On the classic-body Dodge Ram lineup, it fits the 2500 Laramie, SLT, and ST from 2007 to 2010, along with the 2500 SXT (2008–2010) and 2500 TRX (2010); the 3500 Laramie, SLT, and ST from 2007 to 2010, plus the 3500 Sport (2007) and 3500 SXT (2008–2010); the Ram 4000 Base (2010); and the 4500 and 5500 in Base, Laramie, SLT, and ST trims from 2008 to 2010. On the redesigned Ram platform, coverage extends to the 2500 in Big Horn and Tradesman (2013–2024), Laramie (2011–2024), Laramie Longhorn (2011–2021), Laramie Limited (2014–2020), Limited (2016–2024), Limited Longhorn (2021–2024), Lone Star (2013–2015 and 2019–2024), Outdoorsman (2011–2018), Rebel (2023–2024), SLT and ST (2011–2018), and SXT (2011, 2013); the 3500 in the same Big Horn, Tradesman, Laramie, Laramie Longhorn (2011–2020), Laramie Limited, Limited, Limited Longhorn, SLT (2011–2024), ST (2011–2018), SXT (2011, 2013), and Lone Star (2013–2015, 2017, 2019–2022) configurations; the Ram 4000 Base (2011–2013); and the 4500 and 5500 in Laramie, SLT (2011–2016), ST (2011–2015), and Tradesman (2013–2024) trims.
Features
- Direct fit for RAM 6.7L Cummins 2007.5-2024
- Replaces the leak-prone quick-disconnect heater hose, ensuring reliable coolant flow
- Features O-ring-less -10AN connection for improved reliability
- Pre-installed thread sealant for a leak-free connection
- Includes everything needed for a quick and easy installation
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Material: Stainless Steel
- Color: Silver
- Type: Push fit
- Shape: Elbow
- Fitting Angle: 90
- End 1 Type: Threaded NPT
- End 2 Type: -10AN
- End 1 Inside Diameter: 0.5 in
- End 2 Inside Diameter: 0.5 in
- End 1 Outside Diameter: 0.5 in
- End 2 Outside Diameter: 0.5 in
- Inlet: 1/2-14 NPT
- Outlet: -10AN
- Includes: (1) Stainless-Steel AN Adapter, (1) -10AN Push Lock Fitting, (1) Worm Gear Clamp, (1) Mishimoto Lifetime Warranty
Frequently Asked Questions
What does the Mishimoto Top Heater Hose Upgrade replace?
It replaces the leak-prone factory quick-disconnect heater hose fitting at the engine on RAM 6.7L Cummins trucks.
What type of connection does this upgrade use?
It features an O-ring-less, -10AN push-fit connection paired with a 1/2-14 NPT inlet.
What’s included with the MMHOSE-RAM-07HU kit?
The kit includes (1) Stainless-Steel AN Adapter, (1) -10AN Push Lock Fitting, (1) Worm Gear Clamp, and the Mishimoto Lifetime Warranty.
What vehicles does this heater hose upgrade fit?
It fits RAM 6.7L Cummins trucks from 2007.5 through 2024, including a range of Dodge Ram and Ram 2500, 3500, 4000, 4500, and 5500 trims as listed in the vehicle applications.
Does the kit include thread sealant?
Yes, the fitting comes with pre-installed thread sealant for a leak-free connection.
Is this upgrade covered by a warranty?
Yes, it is backed by the Mishimoto Lifetime Warranty.
âš 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.
