Manufacturer HMS PIR STP TWM IMS TMS RIR KS NS MM MS KyS PPIR IR ChS WGI CS Total Dallara 10 10 10 10 10 10 10 10 10 10 10 7 10 10 10 7 10 164 Panoz 7 7 7 7 7 7 7 7 7 7 7 10 7 7 7 10 7 125