I agree with Cuda - you're probably only getting about 125 HP with the full exhaust. You'd need a 1224 kit to get close to 160
167 hp? Must be more done than just full Muzzy+ K&N.
I have the same setup (ZRX + Connie) and can only agree. The Rex gets more attension but I prefer to ride my 2013 C14. Maybe its the newness of the C14. (only had it for 2 month, My 1998 Rex been around for 12 years)
Great combination, the complete each other quite well.
My ass-dyno tells me that the Rex is faster, but that can be psycological (Rex= Muzzy Megaphone and C14 =OEM potato canon) Loud=fast