Honda HR09E/HR10EG engine

The Honda HR-09E and HR-10EG are 3.4-liter, naturally aspirated V8 racing engines that Honda developed and produced for Formula Nippon and Super GT, starting in 2009. The HR10EG was based on the HR09E built for Formula Nippon and powered the Honda HSV-010 GT, which Honda announced on 22 December 2009 as the successor to the NSX in Super GT. The article tracks the car's changes: in 2011 the radiator was divided in two and moved to the sides to reduce the moment of inertia in yaw, and for 2013, the last season under the 2009 regulations, it returned to the front with a shorter exhaust that let the V8 rev higher, the number 17 Keihin HSV-010 placing second in the teams' championship. Applications are the Swift FN09 and the Honda HSV-010 GT.