I just test drove my truck after installing my Adrenaline and I am still in shock! My truck has never pulled good after 2000 rpm and now it pulls hard all the way to redline! That is with old tunes that had to be modified twice to keep from setting the 1211 code! I can`t wait to send my chip in to you for some PHP tunes for the adrenaline! This is one of the biggest improvements I`ve made to my truck. You guys rock and I will definitely be looking you up for my future purchases! A great product and awesome customer service (thank you for all of your answers to EVERY single question I had). It is easy to see why everybody brags on Dieselsite so much.