Not Honda! While "HPD" does come from Honda Performance Development (which is a subsidiary of American Honda), but the chassis is literally "HPD", not Honda, neither Acura. Of course, it could be just as easily branded as Honda (just like it was branded as Acura until the end of 2009) if Honda decided to do so but they haven't decided...
Engine was ok (but in the need of further development), but apparently the chassis had some fundamental issues. Source "10.6.11" @
http://www.mulsannescorner.com/newssept11.html