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The average rear-wheel horsepower (RWHP) for a stock C8 Corvette Stingray is typically between 430 and 440 horsepower. This range accounts for variations due to factors such as engine coolant temperatures, oil temperatures, ambient air conditions, and air intake temperatures.It's important to note that these figures represent the power measured at the wheels, which is lower than the engine's rated horsepower due to drivetrain losses. The factory-rated output for the C8 Stingray's 6.2-liter V8 engine is 495 horsepower at the crankshaft when equipped with the performance exhaust.Some dyno tests have shown even higher numbers, with one report suggesting up to 656 horsepower at the crankshaft when accounting for an estimated 15% drivetrain loss. However, this appears to be an outlier and not representative of the average stock C8 Stingray.Modifications can significantly increase the RWHP. For example, one owner reported achieving 453.53 RWHP after installing various performance upgrades such as a cold air intake, performance manifold, and high-flow catalytic converters.


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