Relentless Diesel just finished installing their stage 2 upgrade to my cp3. It will be a week or so before I can dyno(I have been breaking parts and I am waiting on a billet flex plate). I can say the truck truck pulls harder and according to the rail pressure gauge I can use 3 more levels on the tst. My truck was making peak power on level 5 and now it maintains pressure into the level7-8 range. I am hoping this will get me closer to the 800rwhp mark I have been chasing. I will give some updates as soon as the truck gets dynoed.