2011-2016 Duramax CP4 to CP3 Conversion Kit 9th Injector Feed Line (4D6306)

The 4D6306 is the 9th-injector feed line adapter used to seamlessly convert a 2011-2016 GM LML Duramax fuel system from CP4 to CP3. It's precision-engineered for reliable, leak-free connection at the fuel rail and helps future-proof the setup against CP4 failure.

Part Number: 4D6306

• Converts CP4 to CP3 injector feed line on LML Duramax
• OEM-quality adapter for precise fuel rail connection
• Helps avoid CP4 high-pressure fuel pump failures

• Feed line component only — pump and pump-side conversion hardware sold separately