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experience the highest coolant temperatures
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giving you instant access to multiple power levels at your fingertips
Utility patent
minimize pressure loss
11-16 Duramax LML Fleece CP4 to CP3 Install Kit Engine experience the highest coolant temperaturesWhy convert your LML's Fuel System from a CP4 to a CP3 The stock CP4 is only capable of supporting up to ~500rwhp. A stock CP3 is capable of supporting 600+ rwhp in conjuction with the piezoelectric injectors. The CP4 was introduced as a cost reduction to the LML platform since a smaller amount of fuel is required when running the more efficient piezoelectric injectors. Since its introduction it has proven to be less reliable and less capable than the
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