This Mod uses the original HRT and Caterham cars files and Ive added KERS to these using Ryder CTF Editor, thanks goes to Ryder and concerned who developed this tool. Unzip and just put balanced and track folders into each of the HRT and Caterham cars folders. Make sure to make backup before modding.
Download
http://www.mediafire.com/file/potd51ej7clexao
Download
http://www.mediafire.com/file/potd51ej7clexao