What's the difference in Duramax engines?
LB7 is 300 hp (injector issues, but there are upgraded replacements;5 speed trans)
LLY is 310 hp ( some over heating issues that upgrades can resolve, some say is a detuned LBZ;5 speed trans)
LBZ is 360 hp (great and modded easily;6 speed trans)
LMM is 365 hp (great, but has the dpf but mods bring out its true potential, pistons may not handle extreme hp very well 600+hp;6 speed trans)
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