Industrial Injection LML CP4 New Injection pump
Applications: 2011-2014 LML Duramax
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The latest injection pump to grace the pickup segment is the Bosch CP4. It’s currently being used on Ford’s 6.7L Power Stroke and GM’s LML Duramax. Driven by emissions standards, this new pump was chosen by Ford and GM for its great efficiency and packaging. Although it flows approximately 20 percent less fuel than a CP3, the pump’s two-piston, two-lobe design acts like a four-piston unit, whereas the CP3 is a three-piston design. Also different from its predecessor, the CP4 is timed to the engine in order to prevent pressure spikes within the fuel lines, and all its high-pressure circuits are external (the CP3s are internal). Its maximum pressure is 29,000 psi.