One of our customers bought a AX53B70 of us for his 32 GTST and he make 220rwkw with stock fuel pump, injectors and computer (re-mapped)
He just has a cooler and exhaust, and running 14psi through the turbo.
From what i hear and read they are awesome turbo's and come on boost 3000-3500
Also they come in a full kit with braided oil line's, head gasket etc.