ATP's are shit, they work but they had to redesign the hotside which not only increases lag, it decreases topend. It generlly adds about 1000RPM's of lag and they really are not up to par with an unmolested GT30 or 35R series turbo.
They DO work, but are laggy as shit and you probably wont be happy.
They DO work, but are laggy as shit and you probably wont be happy.