Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Air and Fuel› Fuel Pumps, Regulators and Components
Industrial Injection
Industrial Injection 11-15 GM Duramax 6.6L LML CP4 to CP3 Conversion Kit with Pump (Tuning Req.)
SKU: I002 436403
Moderate — 2–4 hours
Overview
This conversion requires custom ECM tuning to function correctly. The CP4 pump has known failure issues that can potentially damage other major fuel system components, making this upgrade a way to remove those worries.
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Part #: 436403
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Industrial Injection |
| Part Number | I002 436403 |
Videos
Our Biggest Install Yet! DITCH Your Unreliable CP4 Pump For Something Better (Fleece CP3 Conversion)
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WCFab - CP4 Fuel System Saver for LML Duramax
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DIESEL TALK | COMMON RAIL PRESSURE RELIEF VALVES & PLUGS
Cp3 or Cp4, which injection pump is better?
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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