Can't get enough! I have a silver 04 QX56 I just put on a Brute force cold air induction and a custom cat back duel set up out the back. With Magna flow muffler and 4 inch polished tips. She sounds great and is bit more perky. But I am used to a 450 horse 911 turbo. Only thing left is a supercharger. I found one from stillins. Any one know of any other kits? Any one seen one of the stillins kits installed? Would love to here from someone who is running one. Any other performance ideas would be appreciated.