New Cummins ISX CM870 / CM871 Fuel Injectors | No Core Required - 4088665

Restore lost performance or support your next horsepower build with these brand-new aftermarket fuel injectors for Cummins ISX CM870 and CM871 engines. These injectors are manufactured to meet or exceed OEM specifications, providing dependable fuel delivery, smooth engine operation, and long service life. Fits all CM870 and CM871 engine EXCEPT FOR SIGNATURE 600 models, please email us if you have any compatibility concerns - Sales@momentumworx.com

Unlike remanufactured injectors, these are completely new units with no core charge and no core return required, getting your truck back on the road faster without the hassle.

Designed as a direct replacement for factory injectors on 525–600 HP ISX applications, these injectors also provide an excellent foundation for performance tuning, supporting up to approximately 600 BHP and 2,050 lb-ft of torque with proper ECM calibration.

Features

• Brand New Aftermarket Fuel Injectors
• No Core Charge or Core Return Required
• Direct Replacement for Cummins ISX CM870 & CM871 Engines
• Precision Manufactured for OEM Fit and Performance
• Excellent Idle Quality and Fuel Atomization
• Ideal for Stock Replacements or Mild Performance Builds

Performance

Factory Horsepower:

• 525–600 HP

Fits

Engine Platforms

• Cummins ISX CM870
• Cummins ISX CM871
• ISX07
• ISX2
• ISX3 EGR
• ISX 870/HHP

Compatible CPL Numbers

• 0927
• 1434
• 2733
• 2734
• 2919
• 2965
• 3167
• 3320
• 3458
• 3751
• 3752
• 8660

OEM Part Numbers

4088665

4088665RX

4088665PX

4088665NX

4088665R

4076902

4088662

If you're unsure whether these injectors fit your engine, contact us with your ESN (Engine Serial Number), and we'll verify compatibility before you order.

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Why Buy Your Injectors from Momentum Worx?

Not all diesel injectors—and certainly not all injector suppliers—are created equal.

At Momentum Worx, we specialize in diesel fuel systems every single day. We don't just sell injectors; we help customers diagnose fuel system issues, select the right injectors for their horsepower goals, and provide knowledgeable support long after the sale.

The Momentum Worx Difference

✔ Industry-Leading Warranty – We proudly stand behind our products with one of the strongest warranties in the diesel performance industry. S

✔ Real Technical Support – When you call Momentum Worx, you're able to speak with someone who understand injectors, fuel systems, turbochargers, and performance—not a generic call center.

✔ Carefully Selected Products – We only offer injectors that meet our standards for performance, reliability, and value.

✔ Fast Shipping – Most in-stock orders ship the same business day, helping minimize downtime.

✔ Performance Expertise – Whether you're maintaining a stock work truck or building a high-horsepower competition engine, we can recommend the injector that best matches your application.

When you purchase from Momentum Worx, you're not just buying a set of injectors—you're buying the confidence that comes from working with a company that's built its reputation on diesel performance and customer support.