Answer: dualexhaust

AnswerCrossword Clue
DUALEXHAUSTPerformance car feature
DUALEXHAUSTFeature of some cars
DUALEXHAUSTAttachment on some mufflers
DUALEXHAUSTFeature of many a V-8 engine car
DUALEXHAUSTFeature of many muscle cars