low end?

newbie here - just bought '99 accord and put a CAI on it, should be getting my cat-back within the next month or so.

is there anything i can do to give my car a boost at low rpm's, or is this something i just have to deal with? as is, my car has very little power when i'm coming out of a dead stop. i've heard that pulleys or flywheel would fix it?

also, i've noticed a whistle (imagine a footbal referee) when i gun it at lower rpm's - a friend said it was b/c of the intake. is this normal or is there anything i should try to fix it?