While the 5.3L LS4 V8 was the first car engine to feature Active Fuel Management (cylinder deactivation) technology, it was not Flex Fuel capable and did not have variable valve timing. As mentioned, ...
We're used to the unexpected from World Products--things like 454-cube small-blocks and big-blocks with cylinders large enough to warrant their own ZIP codes. But this is something altogether new and ...
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