The GM small block has been the gold standard ... Chevrolet Performance has discontinued the LSA in favor of the LT4 crate engine, making them even more expensive and harder to find.
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GM LS9 Vs. LT4 Engine: What's The Difference?They're still available as crate engines that ... supercharged V8, the LT4 was introduced in the seventh-generation Corvette Z06 in 2015 and it still powers multiple GM products today.
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