So I just installed a full hmf dual exhaust system on my 900xp. I was told by hmf and my dealer I need to run a programmer for the rzr to run right, run cooler and it will mess up the motor if I don’t. My question is what Is a quality programmer, preferably that won’t break the bank, and what is your experience with it. I was looking at the hmf gen 3 or 4. Also are there any dealers or people that have one they would be willing to part with. Thanks in advanced for the help