ive read that i may need to get a MAF messager after i get my SC on. what is it and what does it do?

 

MAF Massager. The stock MAF can only measure about 6lbs of boost, after that it goes out of range, which trips your SES light - MAF out of range - or some such thing. It interrupts this message to the computer.

Edit: The Vortec kit only goes to 6lbs, the Procharger 8lbs. If you've got a Vortec, it's not needed, but probably is for the Procharger.