i have seen it all now :lol
http://motorsports.fanhouse.com/2010/06/09/nascar-issues-major-penalty-to-front-row-motorsports/
http://motorsports.fanhouse.com/2010/06/09/nascar-issues-major-penalty-to-front-row-motorsports/
i am guessing they were modified to relieve pressure to maintain consistency.
"shhh....no one else has figured it out yet but that second VALVE STEM is a pressure relief valve...
Pockets - It's easy enough to google some of the key words in the original articles to find more articles and expand your knowledge. These were BLEEDER caps - not "just" valve stem caps. Bleeder caps are illegal - plain and simple..... it's not something that was made up the day of the infraction.