I hear that these are very Close togeather. It seems that Overkill PCM that I paid for 3 weeks ago is not comming. I have emailed Will at least 6 times over the past 3 weeks and no respose. Whatever Moving on. Looking at these 2 PCMs and wondering what way to go. It cost to must for dyno time here so a custom is not an option for me. What is in my Sig plus a 3.4 pulley, al104's and 180 tstat is as far as I am going with this car.