I know, I did my research 
You see big gains from a 3" exhaust because you’re eliminating the catalytic converter. Mine is already gone. I’m ordering a MaxxFab 3" straight pipe side exit and 3" O2 housing along with a N2O kit when I get my taxes back.
I’m doing the pump and return line because I’m at the limit of the stock fuel system. Nitrous needs more gas.
Since I can’t afford a big turbo…
Stock Turbo w/75 shot > GT3082R