In a diesel engine, every link in the fuel delivery chain must work perfectly to maintain reliable performance — and the Cummins ISL Fuel Pump Adapter (2008–2011, OEM 4921433RX) plays a critical role in that chain. Designed specifically for Cummins ISL engines from model years 2008 to 2011, this adapter provides the secure and accurate connection between the fuel pump and engine, ensuring the system delivers fuel precisely where it’s needed. Choosing the correct OEM-grade adapter helps support efficient operation and long-term durability of your fuel system.
This fuel pump adapter is key to keeping your engine’s fuel delivery system working smoothly — here’s how it supports performance:
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Ensures Proper Fuel Pump Alignment – Provides a precise connection that keeps the fuel pump correctly positioned, promoting smooth fuel flow and preventing leaks or misalignment issues.
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Supports Efficient Fuel Delivery – By securing the pump in the right orientation, the adapter helps maintain consistent flow rates, contributing to efficient combustion and responsive performance.
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Prevents Fuel System Issues – A correct adapter can reduce the risk of pump vibration, premature wear, and poor sealing — all of which can lead to fuel delivery problems if left unaddressed.
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OEM-Grade Fit and Reliability – As OEM 4921433RX, this adapter meets original manufacturer specifications, ensuring proper fit, reliable connection, and long-lasting performance in demanding conditions.
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Simple and Secure Installation – Designed to match factory tolerances, the adapter makes installation straightforward while helping prevent loosening or misalignment over time.
Replacing a worn or incorrect fuel pump adapter is a smart way to protect your engine’s fuel delivery system and maintain optimal performance. The Cummins ISL Fuel Pump Adapter (OEM 4921433RX) delivers the OEM-certified fit and quality needed for stable fuel system operation and dependable engine response. For customers seeking durable, high-quality replacement components, Tamerx provides trusted parts designed to help your diesel engine run smoothly and reliably.







