Well, for what it’s worth here’s my take on it. The 5100s for example, on the 2” rear lift model, are 1” shorter at full extension than the Tremor, so it’s not going to labeled specific. On the 5100 4” model it’s 1.5” longer than the Tremor OE when it’s compressed, so it’s out. The 5165 is shorter when collapsed and longer when extended so that’s all good, but it’s not valved for a F150 but instead has universal valving so it won’t be labeled Tremor specific due to that. It’s the only one (5165) that I’m aware of (could be wrong) that’s in the sweet spot by being shorter when collapsed and longer when extended and is probably the safest bet if you want to replace them right away. If you go off road with them (5165), you aren’t going to tear up anything any worse than you would’ve by using the OE shocks. That’s my take anyways. Someone feel free to correct me if I’ve misstated anything.