As you may have heard or read, the Sierra Sierra EVO 8 Time Attack car beat the long standing HKS CT230R's record of 1:43.523 set back in November 2007. The record breaking occured this past weekend at Redline Time Attack's first event of 2010 (and first event under new ownership) at Buttonwillow Raceway using the 13 clockwise track configuration.

Excerpted from MotoIQ - http://www.motoiq.com/magazine_articles/articletype/articleview/articleid/1522/sierra-sierra-time-attack-evo-8--1432-buttonwillow.aspx