Does the bike rack used the receiver or the ball?

Does anyone know if one can add a hitch to a 2010 Boxster S? My current bike rack requires a hitch. If not, anyone know of options for a non-hitch bike rack?

I have a hitch for my track trailer from these folks. [www.willwoodsystem.com]

They also do bike racks but I don't have any personal experience with them. The hitch is well made and they've been around for a while. Many of the cars that pull trailers to DEs use them.

Dave - 06 987 S coupe SG/NL; gone (but still my first love): 03 986 AS/GG/BK;

I have a hitch that I used to tow a tire trailer. I was able to use a bumper mount type bike rack with this setup using the hitch as the lowest mounting point and then attaching the straps to the trunk lid. Here are some pics on my '05 Boxster. PM me if you want more info. I will be listing it in the classifieds here shortly.

I have the receiver. The link for the Willwood system that Dan from MD supplied looks like it may do the trick. Will contact them.

...ally.