i'm not sure what u want to do with ur car, but the cage that u order it little too thick. ( according to SCCA pro.) but it will be fine it just more weight to ur car. and u need atlease 2 bars from main hoop to a-pillar to compete in pro class that only if u want to caompete pro-class
Formula Drift
PS. formular d use same rule with SCCA PRo