Fleece FPE-CLNTBYPS-CR-ORING-KIT Replacement O-ring Kit for Cummins Coolant Bypass Kits | 1994-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Features:

• Fits 1994–2018 Dodge RAM 2500 and 3500
• Compatible with 5.9L and 6.7L Cummins engines
• Designed for Fleece coolant bypass kits
• Includes three square-cut O-rings
• Includes one standard round O-ring
• Includes two AN fitting O-rings
• Restores seal integrity for coolant systems
• Prevents coolant leaks and system failure
• Ideal for maintenance and system rebuilds
• Some O-rings unused on 1994–2002 models
• High-quality materials resist heat and pressure

Seal It Right And Keep Coolant Where It Belongs

If you're already running a Fleece coolant bypass kit on your Cummins, then you know how important a perfect seal is for keeping your truck running cool and reliable. The Fleece Replacement O-ring Kit makes it easy to refresh your system and prevent annoying leaks that can sneak up over time. Whether you're doing routine maintenance or chasing down a minor drip, having fresh O-rings on hand is one of those small details that make a big difference. This complete kit includes everything you need, three square-cut O-rings, one standard round O-ring, and two AN fitting O-rings, so you’re not left scrambling for pieces mid-job. It’s a quick and inexpensive way to keep your bypass system working exactly as it should. And if your truck is from the 1994–2002 range, don’t worry, you’ll just use the ones you need and keep the rest as spares. Keeping your cooling system buttoned up tight helps protect your engine and lets you focus on the miles ahead.

Precision Fitment For Reliable Long Term Coolant Control

The Fleece FPE-CLNTBYPS-CR-ORING-KIT is a direct replacement O-ring kit for all model year Fleece Cummins coolant bypass systems, covering 1994–2018 RAM 2500 and 3500 trucks equipped with 5.9L or 6.7L Cummins engines. Designed to match original equipment specifications, these O-rings ensure a perfect seal at every connection point within your bypass setup. The kit includes three square-cut O-rings for key sealing areas, one traditional round O-ring, and two AN fitting O-rings to cover all necessary joints in the system. Constructed from heat and pressure-resistant materials, these O-rings maintain integrity over time even in high-temperature environments typical of diesel engines. It’s especially useful during coolant bypass installation, reinstallation, or after any service that involves disturbing fittings or hardlines. For trucks in the 1994–2002 model range, not all O-rings will be used, but having them available ensures future serviceability. This kit helps prevent coolant leaks, protects against system pressure loss, and maintains the overall reliability of your coolant flow modifications.

Fits: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Notes:

• Designed specifically for Fleece Performance coolant bypass kits.
• Compatible with 1994–2018 Dodge RAM 2500 and 3500 trucks.
• Fits 5.9L and 6.7L Cummins engines.
• Includes three square-cut O-rings, one standard O-ring, and two AN fitting O-rings.
• Not all O-rings are used on 1994–2002 applications.
• Ideal for maintenance, reinstallation, or replacing worn seals.
• Ensures leak-free performance and proper coolant pressure.
• High-quality O-rings resist heat, pressure, and chemical exposure.
• Recommended when servicing or reinstalling coolant bypass systems.
• Helps extend the life and reliability of the cooling system.