Hello! Usually with a lifted suspension of 3-4" a bump stop that is 1.5"-2" long than stock is fine for the flexing of the suspension. These Daystar Polyurethane Extended Bump Stops are fine to use on the rear suspension. The front ones would be DAYKJ09114BK $27.99 a pair. You can find it here:http://jo.my/extended_bump-stop Thanks!