Answer: indycar

AnswerCrossword Clue
INDYCAR

"500" race-sanctioning group

INDYCAR

Race-sanctioning biggie

INDYCAR

Brickyard racer

INDYCAR
2005 17-race series
INDYCAR
.. Series: auto races
INDYCARRace-sanctioning body
INDYCARSpeedway racer
INDYCARBig series name in auto racing
INDYCARSTP logo sporter, perhaps
INDYCARVehicle with an STP logo, maybe