Exhaust tips??

[71roadrunnersassy]

Was wondering what the difference between the short and long exhaust tips for the roadrunner as they look very different but do they only fit certain models/exhausts??

 

[butterscotch71]

long tips are for Chargers, short tips for 71-72 road runners (I don't know about 73/74). Tips without the extension on the back are for cars equipped with resonators