Well 11% of 160 is 17.6HP.
I could we wrong but I believe thats around the HP the CTEC II 800 made.
Just doing the math, if the CTEC II made 160HP, this would put this 858 around 177HP.
That would be damn impressive as Doo's 850 is rated at 165 and Poo's 850 at 170.