Watch the closing laps of Saturday’s Nationwide Series race from Bristol, as Penske teammates Brad Keselowski and Justin Allgaier battle it out.

http://i.cdn.turner.com/nascar/.element/swf/2.2/sect/video/nascar_embed.swf?context=nascar_viral&videoId=busch/2010/03/20/nns_bri_high_final.nascar