Over on Edmunds Inside Line they have done a full comprehensive write up with photos on most every part of the 2009 Dodge Challenger R/T suspension right down to the Michelin Pilot tires.  If you are curious and want to learn a little more about the suspension of your Challenger R/T you should definitely check out their write up which describes certain key suspension parts and what they do.  If words like control arm, coil-over, dual pivot,  light off and u-joint have you scratching your head you should give  the suspension review a look to see what keeps your Challenger on the road.  Read more about the Challenger suspension here.