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  1. General Discussion
    The Cummins. It’s the engine that brought inline-six architecture, direct injection, the P-pump, and true, industrial-level strength to the ¾-ton truck market. In either 5.9L or 6.7L form, its stroke (4.72-inch, and then 4.88-inch) dwarfs the competition and produces the most usable off-idle...
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