turbo upgrade

Why Z54, you hear good things about'em? I'm running a turbonetics 6262 ball bearing and it's a beast on my setup. Got it from a member on here for $450.
I just installed the z54 with updated tune and wow, the car is an animal now. boost is around 23-24 psi. I've got a quaife lsd ready to install, hopefully this will help with the torque steer and spinning. From what I've read on this turbo, I should be around 400hp on pump gas.
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