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A detuned version of the LS9, this supercharged 6.2L engine is standard in the 2009 Cadillac CTS-V. It is built with several differences, when compared to the LS9, including hypereutectic pistons vs. the LS9’s forged pistons; and a smaller, 1.9L supercharger. The LSA also has a different charge-cooler design on top of the supercharger. Horsepower is rated at 556 in the super-quick Caddy.