Dont jump the Gun Bro, they are NOT "Fake" Turbo's, but ALL turbo parts sourced from other cars, that quite literally put to shame the JUNK Stage 4 & 5 turbos as each of them is POS.
I actually figured out HOW turbos work in GT5 and why some cars get big gains and other get itty bitty gains
the more you know huh... Anyways I can even mimic the POS ticket turbos, and improve upon them on top it, boost kick in a little earlier or later its all good, but I figured the Turbos out, So I guess they are fake lol...
Look at the Dyno sheets bro
Thats some sweeeeet power... But its all good Bro, you keep those Junk ticket Turbos and honestly Stage 3 most often performs better on the track then those Junk 4 &5 tickets ROFLMFAO