With all the hype about the Gen III LS1 and 6.0L engines, a little 5.3L engine has appeared in well over a million GM trucks since 1998 that's been overlooked in the rush to make horsepower. This ...
Among the advantages of these engines are factory aluminum heads, lightweight composite intakes and in some cases aluminum blocks. Many, such as the 5.3L (RPO LM7) have a cast-iron block with aluminum ...
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