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Discussion Starter · #1 ·
The Duramax engine has used a Bosch CP3 injection pump since its introduction in 2001 with incredible success. The CP3 injection pump has proven to be extremely reliable and capable of supporting major performance with the help of the aftermarket who has modified them for increased volume and created dual and even triple pump kits. But, with tightening emissions standards, the LML platform was released in 2011 with an all new CP4.2, also supplied by bosch, which replaced the CP3.
 
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