I have the 3.7 with QDI, although a V8 with QDII would have been nice. I am quite happy with the offroad performance , I have gotten through some deep mud that even my friends 2009 Z71 4x4 silverado couldnt even drive halfway through. Also, when purchasing my car, it was either 4.7 2wd or 3.7 4wd, so I just had to go with the 4x4 lol.