Genuine GM Parts 12685979 - Gen V LT5 Supercharger Cover Assembly

To increase peak output by 105 horsepower and maximum torque by 65 lbft (88 Nm) versus the LT4, most of the components topping the LT5 engine are new:
• The Eaton-developed Twin Vortices Series (TVS) superchargers displacement is 52% larger to deliver substantially more intake air. This blower is spun 2.4 times crankshaft speed versus the LT4s 3.1:1 drive ratio. Peak boost rises from 9.4 to 14 psi. A side benefit of the new supercharger design is that the LT5 is quieter than the Z06 in its Tour driving mode.
• The larger supercharger consumes just 1 hp during cruisingbut a significant 110 hp while delivering maximum airflow and boost. The LT4s peak parasitic loss is 94 hp.
• The number of ribs in the drive belt is increased from eight to 11.
• The LT5s 95-mm (3.74-in.) throttle body is 8 mm (0.31-in.) larger than the LT4s inlet plate and a new blower bypass valve vents excess air more efficiently.
• Two significantly larger intercoolers double the LT4s charge-air heat rejection, necessitating a 73 mm (2.9-in.) increase in the height of the intake plenum cover.
• To supplement the direct fuel injection during high-load conditions, a new port-injection system operated by a second electronic control module has been added to the LT5.