Number 4 and Number 5 Injection Line

Features:

• Direct replacement for cylinders 4 and 5
• Fits 2007.5–2018 RAM 6.7L Cummins engines
• Replaces Cummins OE part number 4935974
• Designed to fix cracked or leaking lines
• Restores proper high-pressure fuel delivery
• Built to meet or exceed OEM specifications
• Precision fit for easy installation
• Ideal for maintenance or repair work
• Helps prevent injector misfire and fuel leaks
• Made by Fleece Performance for lasting durability
• Engineered specifically for 6.7L Cummins platforms

Fix Fuel Leaks And Get Back On The Road

There’s nothing more frustrating than tracking down a hard-to-find fuel leak or dealing with a misfire you just can’t shake. If your RAM’s high-pressure injector lines have cracked or started leaking, the Fleece Number 4 and Number 5 Injection Line is the direct-fit fix you’ve been looking for. Designed specifically for 6.7L Cummins trucks from 2007.5 to 2018, this replacement line restores fuel delivery and eliminates the common issues that come with old, fatigued factory hardware. It’s a no-hassle solution that bolts right in and brings your system back to spec without the guessing game. Whether you're daily driving or hauling loads, clean and consistent injector flow makes all the difference in performance and peace of mind. With Fleece Performance behind the build, you know it’s a part you can count on. Don’t let a worn-out line sideline your truck, this simple upgrade gets you back to business fast.

Precision Fit For Reliable High Pressure Delivery

The Fleece FPE-FL-CUMM-6.7-45 is a high-pressure injection line engineered to replace Cummins part number 4935974 on cylinders 4 and 5 of 6.7L engines. It’s built to meet or exceed factory standards and designed for a direct-fit installation, ensuring a tight, leak-free connection and consistent fuel delivery. Cracked or leaking injector lines can compromise injector function and fuel atomization, leading to rough idles, loss of power, and long-term engine damage. This replacement line eliminates those concerns with a durable, properly routed solution for high-pressure fuel systems. Its construction and geometry match OE specs to maintain proper clearances and prevent vibration fatigue. Fleece’s attention to manufacturing detail means no guesswork when it comes to fitment or performance. For routine service or repair work, this injector line provides a dependable fix that restores performance and protects engine longevity.

Fitment:  2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 RAM 2500/3500 6.7L Cummins

Notes:

• Designed as a replacement for cylinders 4 and 5 injection lines
• Fits 2007.5–2018 RAM 2500 and 3500 trucks with 6.7L Cummins engines
• Direct replacement for Cummins part number 4935974
• Ideal solution for cracked, leaking, or broken high-pressure lines
• Manufactured by Fleece Performance for reliable quality
• Restores proper high-pressure fuel flow to injectors
• Essential for maintaining consistent combustion and engine performance
• Recommended during injector service or when replacing factory lines
• Engineered to match OEM specifications for proper fit and function