What kind of dyno numbers can a Procharger put out

[onequick5.3]

The place where I am buying my procharger from showed me some dyno runs from custom tuned Procharged 4.8 and it was 348!!!!!! I dont know if it was BS or not but that seems high for a 4.8 they also said they started out NA at 190 rwhp I think the truck is a 99 as well that like a 158 rwhp increase is this the norm or BS
The only other mods are shorty headers

Just wondering if its possible and any other 5.3 Procharger dyno numbers are appreciated. Just wonder what kind of power I am gonna make

[yeary03SS]

On a dynojet my 2001 5.3 motor made 352 rwhp and 348 rwft-lbs of torque. This was with no tuning. I had it custom tuned and changed to larger injectors and I could tell it ran much stronger, but never had it re-dynoed with these.

[onequick5.3]

Damn, that impressive! Expecially with no tune! From what they told me, the FMU is do-able but its really junk. They told me they pick up almost 40 rwhp from the tune alone. I differance between the other truck and mine is of course the 5.3 and I have the Dynatech longtube headers. I bet I could damn near make 400 rwhp with a custom tune 42ib injectors and a Walbro 340 fuel pump.

I am also going to try and fabricate so I can still utilize the KN FPIK that I have.