This is the engine that will power the 2015 Corvette ZO6. At 6.2L, power is likely to be 625 hp or more with torque in excess of 635 lb-ft on pump gas with factory durability. The LT4 takes major cues from the direct-injected LT1 and adds an Eaton 1.7L supercharger. Note the small blower pulley compared to the diameter of the crank drive pulley. That is some serious overdrive goin' on there.