I got this in a put together kit, Initially I plan on running 7psi, but after I blow the motor (170k miles) I will probably build it mildly and run 15psi, I am pretty sure this turbo wont do that...anyone know what it will do on an ls?

 

I had a kkk26 on my stock b16 and it pushed 10 psi no problem. Easily could have done more(apparent from a few spikes). Spooled up fully to 7psi by about 4200k and pulled nicely all the way to 8500k. Try it out and you could always upgrade.
Here's a pic of one I have next to my t3/t4 turbonetics which would easily push 20psi. I know there is more than just how big they look but they are pretty similar.