Simplify the following text for a Grade 4 native English-speaking person.
Original: Bourdais has frequently contested the famous 24 hour race of his home town , entering for the first time in 1999 ( aged only 20 ) in a Porsche 911 GT2 run by Larbre Competition .
Simplified: He entering for the first time in 1999 , at the aged of 20 . He drove a Porsche 911 GT2 run by Larbre Competition .