I have a 4WD Suburban with a 3"" lift. The shocks that included with the lift kit were extremely stiff and presented a safety hazard by causing the front end to almost 'lift off' the surface when hitting a bump. Replaced them with Bilstein 4600's. Even though they were supposed to be a direct fit, they were too tight for the upper factory mount and wouldn't quite fit in properly. Ended up having to use an angle grinder with a 60 grit flap disc to shave a few thousandths off the upper bolt sleeve, after which it fit in nicely. Great shock, but be aware you 'may' need to modify it a bit.