Jason, it is not so much the pressure in psi, but more of how much power you are happy with. 25 psi on a the stock turbo is != 25psi on a larger turbo, as you might already know. These engines are extremely strong, and will take the pressure just fine. Provided the HG is not already leaking that is, but that nearly goes without writing for any engine.
If you are happy with the power at 25 psi, then no, you will not need to upgrade.
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