im gonna get my car street tuned and i was wondering if it would be better to use the stock boost controller or a ams manual one?

 

uh stock boost controller?

Boost control:
Manual Boost Controllers (cheap, effective, and best of all they work with no hassle!):
-Joe P XZ
-Hallman ES
-DB Performance
-Skip the ebay ones here, they are usually sub-par.
ECU Controlled Boost:
-option #1 (warranty friendly):#65 pill ($10-30 in parts- pills available pre-drilled here)
-option #2: Wire in GM BCS (~$70 in parts due to a recent price increase)
If you go the GMBCS route pick up an evo X map sensor for ~$150 to save yourself the hassle of load-based and to just do it right the first time. Omni has also recently released a 4-bar MAP sensor that is able to be had for around $120. Use this with mrfred's direct boost control mod for optimal ecu-controlled boost.
Evo8's set PEAK boost to 21psi (untuned) or 23psi (tuned)
Evo9's set PEAK boost to 22psi (untuned) or 24psi (tuned)

 

There is no such thing as "stock boost controller".

 

the stock boost solenoid

 

the boost that is controlled by the ecu i meant

 

If you'd like ECU boost, its best to go with a 3 port solenoid and not the stock one.

A MBC (manual boost control) is simple and easier for the end user, in case you need to lower the boost for some reason, add new parts n have to adjust the boost or if you just wanna raise the boost and throw some race gas in.