Yet another MAF questiion...search helped but...

[Chaotic_Warlord]

Ok I under you need to upgrade your MAF to install an aftermarket intake on a KA but I am curious about a couple things; First off what is the specific reasoning behind this? Secondly I know you have to have either a ecu upgrade and/or a SAFC unit to make the MAF work due to a difference in voltages so I am looking into both options, but what about fuel delivery, do you need to upgrade your injectors or any of the rest of the fuel system to get the proper A/f mixture when using a CAI or RAI? As far as the Greddy E Manage system goes which adapters do you need to use? As far as the JWT ecu reprogram vs. S-AFC vs E-Manage which is the better option? Again I di a search and some of my questions were answered but these still have me stumped.