Hey everyone. I am thinking about getting the Mac SraightShot CAI. It comes with a chrome 85mm MAF. Price 249.50 at partshopper. My Question is, will the MAF meter need to be calibrated OR will I need a tune once this is installed? I hear so many horror stories about after market MAF's that I be scared. Check my sig, I have had no problems with any of these mods. Thanks for your help.