The Mack E3.5 reman fuel injector EX631028 is a premium OE remanufactured injector designed to restore fuel delivery performance and engine efficiency in Mack diesel engines. Built with high-quality components and tested on OE-designed equipment, this injector delivers reliable operation and consistent fuel injection performance.

The Mack E3.5 reman fuel injector EX631028 includes a new nozzle, NOP spring, electrical connector, and complete O-ring replacement to ensure dependable sealing and fuel delivery under demanding operating conditions.

Key Features

• Premium OE remanufactured injector
• New nozzle, NOP spring, and electrical connector
• 100% O-ring replacement
• Surface lapping of critical components
• Tested for leaks, fuel delivery, pressure, and timing
• Reliable diesel engine performance

OEM & Reference Numbers

• 21457950
• 21554442
• 21246331
• 21106498
• 21028628
• 20965224
• 20893021
• 20833111
• 85013147
• 85013148
• 85003711
• 85003886
• 85003110
• 8500910
• 8500836
• 85013146
• 85013144
• 85013145

Compatibility

Mack Applications

• Mack CTP (2007–2008)
• Mack LE (2007)
• Mack CXP (2007)
• Mack GU7 (2008–2009)
• Mack MRU (2008–2009)
• Mack LEU (2008–2009)
• Mack GU8 (2008–2009)
• Mack CXU (2008–2009)

Benefits

• Restores proper fuel injection performance
• Improves fuel efficiency and engine response
• Reduces injector-related issues
• Tested for OE-level reliability
• Cost-effective remanufactured solution

Package Includes

• 1 × Reman E3.5 Injector

Warranty

DELPHI EX631028 includes a one-year warranty with unlimited mileage during the first year.