I haven't seen this posted elsewhere. My apologies if it was.
http://americanlemans.com/News/Article.aspx?NewsID=1771Braselton, Ga. - The International Motor Sports Association, the sanctioning body of the American Le Mans Series, has announced a number of rules adjustments for the 2006 American Le Mans Series, which starts with the Mobil 1 Twelve Hours of Sebring on March 18.
Two deal directly with GT1 entries. Aston Martin Racing's two DBR9s will compete with a minimum weight of 1,125 kilograms, the standard minimum for GT1 cars. That is 50 kilos lighter than was mandated by the ACO following last year's running of the 24 Hours of Le Mans, due to changes in the car's aero package since the 24 Hours. That also is a reason for a larger air restrictor, which will allow more air into the engine and produce more horsepower.