Looks like the Civic Si is off to a good start.
http://www.vtec.net/news/news-item?news_item_id=456455
Torrance, Calif. 12/05/2005 -- Competing in its first sanctioned motorsports event, the all-new 2006 Honda Civic Si placed first and second in class at the grueling "25 Hours of Thunderhill" endurance race at Thunderhill Raceway Park in Willows, California. Honda campaigned two identically prepared and nearly stock Civic Si racecars in the event
........While the basic engine, transmission, and brake system remained stock, the Civic Si's 2.0-liter engine was enhanced by a custom intake from AEM and exhaust components from DC Sports........