So I got a SS/TC. I recently bought myself a 3" electric cutout downpipe, and also tuned the cobalt to 22 psi. Now, I'm wondering if I should buy the Power Upgrade Kit from GM? Is it worth it? They say I'll be able to break the 22 psi barrier, and go to 29... It's $500.. Here's the link.
19212670 | LNF Turbo Upgrade Kit | GM Parts House

Yes or No?

 

thanks for being a dick?

 

Dont bother with the GMS1, it wont get you anywhere near 29 psi. Trifecta will get you as far as you need to go.

 

Why re-retune your car? All your getting is upgrade sensor and new tune with the GM kit. What or who tuned your car to 22 psi?

 

I bought a Superchip Flashpaq. It basically lets you tune your car.
I got it used on eBay for $210.

 

Get someone to HPtune you or go trifecta