HELLO THERE THE DIFFERENCE IS THE MASS AIR METER HAS A DIFFERENT BOLT PATTERN AND THE TUBES IN AFTER MARKET MASS AIR METERS ARE CALIBRATED FOR YOUR STOCK COMPUTER SO IF YOU HAVE A 93 IT IS CALIBRATED FOR THAT APLLICATION. YOU SHOULD BE ABLE TO PURCHASE A C@L COMPO FOR 30LB INJECTORS FROM HOLCOMB
