The Disco Potato Easily The most Famous Turbocharger that Garrett has released with a T25 back housing, the Disco Potato (GT28RS) has been seen on a variety of small displacement vehicles making good horsepower levels up to 330 whp. Designed with powerband in mind. With it's high flowing NS111 turbine wheel and highly efficient 60mm compressor wheel, the Disco Potato is the choice of many turbo enthusiasts.