idk wtf it is cuz my mechanic dude who checks it out never told me theres a exhaust leak shudnt they chek that [censored] wen i take it ... and i asked him he told me the thermostat is bad and my dad says its a tough job to change thats why he doesnt bother with it..buts its my car nnow so iwant it to be pimp not heatin up so much i know it posed to stay hot but it stays hot for liek 4 hours i cant even open the hood and tuch the lil hood prop up with gettin burned