injection pump

Industrial Injection CP3 Stage I "Bag of Parts" Duramax anybody use this before or know of anyone who has?? im wondering if it would be worth it. my goal is 600-650 rwhp.

Two weeks ago truck was lossing power accelerating and blowin out some white/gray smoke. Fuel filter was loose problem solved. After a couple days now no noticable loss in power while driving or towing, i pull a gooseneck about 3k miles a week loadin up to 26k. However idling its runnin choppy...