Not sure what combo I want to go for but performance doesn't matter tooooo much right now (As I researched adding this will gain little or non.... or even lost of power). Now my question is will it be any issues if I don't install the plenum spacers now? I plan to in the future for the gain but would like to wait a bit for that mod.

Any issues with just installing the Z-Tube with PC/Stillen SR?

PS: The PC looks so ugly in blue =x