Turbonetics Mid-Frame Turbochargers are the absolute largest units with a T4 Flange. They feature Turbonetics exclusive Ceramic Ball Bearings as standard equipment. These units will meet and exceed the needs of high horsepower racers and crazy street applications. The Mid-Frame compressor side is designed for 72, 76, 78 and 88mm HP wheels. The turbine side is one size up from the T4, using F1-75 turbine wheels. Turbonetics has maintained the T4 inlet flange and uses a 4" outlet on the turbine housing. This makes installation easier by integrating the Mid-Frame turbo with existing hardware. This combination supports 900 to 1500 horsepower, making it the most power you can get from a T4 flange.