Riveted to the passenger side strut tower, every 2009 and 2010 Drag Pak features a laser-etched aluminum I.D. tag like this. Cars built in 2009 have serial numbers starting with 2009. This example is the third 2010 unit built and accordingly bears serial number 2010003. We haven’t yet seen if Mopar has retained this identification system on the new $85,512 Viper V-10 powered Drag Pak Challengers for 2011.