MAF system is some bs marketing term coined by C&L apparently. It probably consists of a cold air intake and their mass air meter all in one. They probably sell it as a kit and call it the "MAF system".
Don't let those dumbasses confuse you. BTW, I'd never by anything with C&L on it.:xpl:
EDIT:
I just read that you have the stock meter in the system. Sounds like it's just C&Ls marketing name for a CAI/RAI.