I know there are a bunch of threads out there about tuners and such but I wanted to give my 2 cents for anyone thinking about getting one. The Predator is awesome. It has made my truck a completely different animal. I love it. And I really like the different options available. Installation is so simple. I have a 2011 Silverado with the 5.3 AFM and I put a K&N CAI and Magnaflow muffler on it. It runs much better than it did off the lot. Throttle response is almost immediate, the power band is solid and the torque at the wheels is badass.