The Acura ARX-01, later known as the HPD ARX-01 is a series of Le Mans Prototype built for sports car racing, specifically in the American Le Mans Series, Le Mans Series, and at the 24 Hours of Le Mans. It is the first purpose-built race car by the Acura division of Honda Motor Company, part of their multi-year program to eventually compete in endurance race. The car debuted in 2007 in the American Le mans Series before expanding to customers in Europe. Over the years various specifications of the ARX-01 chassis have been developed, each signified by a letter suffix. In 2010 Acura withdrew their name from the program and Honda Performance Development which developed the car for Acura continued the program into 2011.
At the 2006 North American International Auto Show in Detroit, Acura officially announced their plans to develop a Le Mans Prototype program for the American Le Mans Series, competing in the LMP2 class for the initial year of competition in 2007. Acura announced they'd be using customer chassis from Lola Cars International of the United Kingdom and Courage Compétition of France, while the engine would be built entirely by Honda Performance Development of the United States. Acura planned to use the customer chassis for the first year, then to build their own chassis for 2008, followed by another new chassis for a move to the top LMP1 class in 2009. At the Detroit auto show, Acura showed their first customer chassis, a brand new Courage LC75.
Following the announcement of the three teams involved in the project, Acura announced that for 2007 each team would concentrate on a certain aspect of development for the planned 2008 car. Andretti Green Racing and Highcroft Racing would use Courage LC75 chassis, and work on chassis design and aerodynamic modification. The third team, Fernández Racing, would use a Lola chassis and concentrate on developing the new Acura V8 engine. A third Courage LC75 would be retained by Honda of America for use as a developmental prototype.