Modified turbochargers refers to turbochargers that have been altered or customized in some way to improve their performance or efficiency. Full definition
Brabus also added two modified turbochargers with larger compressor units and modified exhaust manifolds. (mercedesblog.com)
The German tuner modified the turbochargers and the cooling system, installed a custom exhaust system, and remapped the car's ECU unit, all of which were done to give the 1M RS an output of 514 horsepower and 453 lb / ft of torque and a top speed of 186 mph. (topspeed.com)
Modified turbocharger oil circuit for increased pressure at the turbo and faster oil delivery (topspeed.com)