3800 Performance's "Stage" packages are junk just like ZZP's. Don't bother. Read the threads here and learn more
The Short Stack is junk if you can get the Full Size then do it. The Stage 2 is great. If I had 2 grand and going that route I would also grab a S2IC, 3.1" MPS, Headers of some kind, get a tune...a intake (DIY), 180* T-Stat...