So I have a question about COS he mentioned in the post below. I am trying to run my 2000 5.3L in speed density and been running into a road block. I seen he had XDF for two custom operating systems in that post but no BIN files. Do I need a bin or just take a stock bin of same OS as xdf and when tuner pro saves it, it becomes a COS? If anyone has a custom OS for speed density on a P01 ECU with a usable XDF, that would be amazing as well! Thanks guys


http://www.gearhead-efi.com/Fuel-Inj...ll=1#post73585