I have a 2010 shelby gt500 with :

Upper pulley, +10% lower pulley, offroad xpipe and a dyno tune. Car put down just under 600rwhp/tq with 15lbs boost

Do I need a MAFia now, or would that be something that will benefit me once I put on a larger/twin screw blower?

I have an SCT handheld programmer ...