Just ordered mine a few mins ago, no it's not GSC specific, but can be used in junction with instead of those half cars But for all you track ****** who've been tearing it up around the country Dunno if i'm gonna do helmet or back window yet...hmm..

http://www.trackgraphic.com/

 

I actually know the guy who owns that. He's a fellow NASA MA racer. Cool guy, even after I bashed up his other mustang friend.