Modifications over the Z06 include increased cooling and aerodynamic downforce, including similar front splitters, rocker panels, and front- and rear-brake cooling ducts; a 5.5-litre LS7.R naturally aspirated V8 engine developed specifically for the C7.R having a power output of 491 horsepower , modified suspension system to accommodate wider racing tires and larger brakes, air intake openings on each of the rear quarter panels above the brake ducts, a fixed motorsport rear wing, and larger radiator inlets.