The CR-Z GT will race in the same class as the Subaru BRZ GT300 and Toyota Prius GT300. That latter car also uses a specially designed hybrid system with a larger battery from the Prius Alpha and a naturally aspirated 3.5-liter V6.
The Honda CR-Z GT was recently tested at Twin Ring Motegi, scroll down to watch the video and check out the official press release.
TOKYO, Japan, July 4, 2012 - Honda Motor Co., Ltd. has announced its intent to provide technical support to Team Mugen, operated by M-TEC Co., Ltd., for its competition with the MUGEN CR-Z GT in the GT300 class of SUPER GT Series. Honda will supply a 2.8-liter V6 twin-turbo engine and the racing hybrid system developed exclusively for this Team Mugen racing machine and will start actual test runs.
Team Mugen's first race with the MUGEN CR-Z GT featuring the Honda racing hybrid system will be the 2012 SUPER GT Series Round 4 SUGO GT 300km Race held on July 28-29, 2012.