This is my current setup on my 2017 LS3 Chevy ss, I’m only running 5lbs of boost and want to run around 8. What are supporting mods that need to be done for this to be done!

 

Did you add a picture(I can't see pictures on this computer for some reason)

If not, what's the set up?

 

What fuel are you running? If you’re on e85 all you need is to tune for it. On e85 you could very safely run 15lbs.
If your on 93 get a meth kit and tune for more.

No way in hell I’d spend 13k and run 5psi. You car can easily handle a lot more.
For that level should have just put a LSA blower on it and save 10k

 

I would say... just take it back to the place that did all that work and have them add more boost.

 

Is that the shop owned by Bob Pickerill? I hear good things about him. Did he tune it? Maybe it's limited to 5psi due to needing more fuel pump?

 

What are you running for boost control? I can't believe it was only tuned to 5. But the tuner should have went over that all with you. JMO