In the Cummins the M11 and 855 came before the ISX/ISM engines. Even tho the sizes are similar that's about the only thing that is. The ISX is all new with dual overhead cams and a single head. They are a more complex engine but have proven themselves to be as good or better than the older engines, altho less easy for a novice to work on. My old truck had an ISX set at 435 hp from the factory. I had a diesel guy turn it up to about 600 hp at one point, but had to turn it back down to 550 hp because it would heat up since I hadn't changed the turbo and injectors. When I sold it it had just less than 1 million miles and used no oil and had no major work done. It did need a turbo at the time tho which was $3500.00 from Cummins, but about $1750.00 aftermarket.
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Today's Featured Article - The David Brown Rose Badge - by Samuel Kennedy. In the 13th century civil war was raging in England. Two English noblemen were involved in a conflict which became known as the War of the Roses. The Duke of York had as his emblem a white rose and the Earl of Lancaster had a red rose. Today the white rose is the official emblem of the county of Yorkshire and the red rose has been adopted by the neighboring county of Lancashire.
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