Pretty sure they're actually 53" - I will check when I get my car back from the shop tonight.

You can always saw off any excess - so go longer. Once you saw, you simply replace the plastic endcap for a nice clean finish.

__________________
Current Vehicles:
2006 BMW X5 4.4i, Premium, Sport, Cold Weather, Rear Climate, Rear Heated Seats, PanoRoof, Air Suspension, Comfort Seats, Nav, Alpine White with Light Poplar and Truffle Brown Interior

2007 BMW 335i Coupe, Premium, Sport, Cold Weather, Space Grey With Dark Burlwood & Black Leather