If I were you I wouldn't waste the money on a new MAF or a new throttle body, the stock one is going to suit your needs until you're making some serious HP (we're talking 400+ to the wheels before you need to think about changing those out), when you do need to think about changing out the MAF I'd suggest trying to pull a MAF off on an 02+ Z06, it's 85mm and doesn't have a screen, and it'll be cheaper than the SLP, especially if you can find a wrecked Z06 in a junkyard. I'd suggest doing the free-mod on the intake and start thinking about Long Tube headers and a new Y pipe.