I agree with Raist11 above , well said .
I have a 2014 QC 4X4 , I set my bills to +2.8 " a little over 5k miles ago and my ride is still better than stock and I've never had any vibrations at all . I've driven I 2wd 90+mph and 4wd to 55mph , I use 4wd at least every week and sometimes daily from September through January (Deer season )
The install is a pretty easy DIY if your into that stuff , if you have Qs during your install post them here I'm subscribing now .
Also watch the you tube video on How to install a lift kit Ram , it's a pretty good confidence builder if you need it .