PTE (the manufacturer) rates the 5027 at 450hp

Exhaust wheel Inducer 2.559" (65mm) Exducer 2.121" (54mm)
Compressor wheel Inducer 2.123" (53.9mm) Exducer 3.000" (76.2mm)
.48 A/R Mitsubishi flange

I'm not 100% familiar with turbo wheels but they told me it was slightly bigger then a 20g with better spoolup characteristics because it's a ball bearing turbo and is fully ported. I'm sure someone with more expertise in this area can make something of the above data?