My point being that you aren't going to increase performance by changing the MAF, TB, injectors, CAI etc enough to warrant changing them by themselves.
Both the heads and intake are very restrictive on these cars and changing the intake only kills bottom end ( obviously depending on which you go with) you may notice a little up top on the SOTP dyno, but until you look into swapping the H/C as well, you won't get much of an answer to "how will it affect my ETs".
I only say it because I've done it myself.
24# injectors, CAI, 76mm MAF/TB and a TFS track heat on an otherwise stock car was disappointing at best. Learned the expensive way.