Starting with the obvious, they are both 6.2 liter, pushrod V8 engines that share the same 4.065-inch bore and 3.622-inch stroke. They also both use an aluminum block and L92/LS3 cylinder heads.
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The World's Highest-Revving Pontiac Engine From Factorythe bore and stroke of the piston, and the total mass of the internal assembly, including how well-balanced it is. In GM's own words, the LS3 boasts a "sturdy reciprocating assembly", in addition ...
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