hello everybody how are you i have this car 2013 sierra 2500HD 6.0 V8 and would like to gain some more HP at least 15 hp that i can feel withought damaging the engine i mean in the safe zone the car uses 95 octane and have CAI with catback exhaust system
i cant upload the file to website because it is 2.4 mb here is a link to download it

http://www.megafileupload.com/fq0C/2013_sierra_hd.cal
can someone tune the file below and tell me what changes they made thanks