"Performance upgrades" refer to modifications or enhancements made to a machine, vehicle, system, or individual to improve its overall performance or ability to perform better than its original state. Full definition
The range of performance upgrades is vast, giving extra power of between 34 and 93 hp depending on basic engine. (topspeed.com)
The company is working on performance upgrades for both the diesel - and gasoline - powered cars, starting with a front limited - slip differential. (autoweek.com)
Performance upgrades include impressive horsepower and torque, larger brakes, and standard quattro ® all - wheel drive. (audihoffmanestates.com)