I test drove a brand new crew cab short bed today. I think it had the LB7 in it. It has power,but I still am not totally convinced how much power . I'll get Chevy but the salesman was riding with me so I couldnt really test the power. I'll get to someday. It is truly quiet though, I could not believe how quiet it was. I didnt have the radio on and I almost couldnt hear the motor. I wish I new what they sounded likw with a straight pipe on them because that exhaust was as quiet as my Z71 was when I bought it.