Since its introduction, the CP4 has proven to be less reliable and less capable than the CP3 used in previous Duramax platforms, resulting in costly repairs for owners when a CP4 fails. Our CP3 conversion kit lets you easily adapt a CP3 to your 2011-2016 Duramax.

In conjunction with the piezoelectric injectors, a CP3K conversion is capable of supporting 600 and up rwhp and a PowerFlo 750 conversion is capable of supporting nearly 850 and up rwhp.

Kit Contents:

• High Pressure Fuel Rail Line
• Fuel Rail Plug and Nut
• CP3 Block Adapter with O-ring
• (3) CP3 Block Adapter Bolts (Flange Head, M8x1.25x35mm)
• CP3 Pump Fittings - 3/8 inch
• CP3 Pump Fittings - 1/2 inch
• (2) Sealing Washers
• Low Pressure Fuel Feed Line
• 3/8 inch x 8 inch Flexible Fuel Line with Hose Clamps (CP3 Return)
• 1/2 inch x 30 inch Flexible Fuel Line with Hose Clamps (Filter to CP3)
• 3/4 inch P-Clamp