Go 850 CC Injectors I have 660's and I am close to topping out with my config at 281RWKW running a Hypergear SS1PU
Get a metal intake pipe, the silicone ones tend to suck in @ big boost levels.
Full 3" turbo back exhaust, 2.5" is going to be hella restrictive (you would already be making more power if it was larger)
Coil packs (Splitfire or Yellow Jacket)
Hypergear SS1PU is perfect for this application, It spools like factory and is able to do big boost.
First rule of forced induction, More flow in + More flow out = More power.
If you don't upgrade that exhaust your tuner will only be able to pull a tiny bit more power safely, Put a 3" bellmouth JJR dump on it, a race cat and a 3" cat back system (can get decent cat back systems 2nd hand for cheap) and it will make a massive difference.