Oh man, here we go... the rods v. GAP discussion.
My 2 cents are as follows: Just get the GAP tool if you plan on owning this thing long term - the tool will more than pay for itself.
However, the real solution to doing hardcore off roading in an LR3/4 and RRS is a mix of both lift rods, GAP and a 3rd element: the SYA kit. See, lift rods will just fool your height sensors and overinflate your bags (The extra stress from over inflating is negligible IMO but there's no denying it is extra). Sometimes you need to run lift rods if you intend to increase tire size and for aesthetic reasons as well. Unfortunately, you lose significant compliance because now your bags are inflated permanently to off road height. Even worse is that the truck will still self-raise itself if you hit an obstacle and it thinks you're too low (incorrectly). So it will raise to "off road height" which with rods is actually "super extended mode" for a truck without rods. That last mode is basically zero suspension travel at all; the truck will start to bounce over small little rocks and you'll actually have far worse traction than a stock truck.
So...the solution is to run an SYA kit so you can have the spacers/bump stop extension which will give you a 2 inch lift while also maintaining stock pressures on your airbags. With an SYA kit it's actually recommended that you run the lift rods to keep the sensors in the proper operating range (people get failures for having sensors that read out of the normal range - happens when you run a lot of lift exclusively with a GAP tool), and the GAP tool will allow you to lock the suspension (i.e. prevent the truck from self raising) while actually running a custom height tune. It's a PITA, but for $1000 all in these things become unstoppable and far more reliable/compliant than just lift rods or a GAP tool.
Please let me know if that makes sense - I'll be more than happy to edit/clarify further if the above isn't sufficiently clear.
This kit is for the person who plans on off-roading with their LR3 or LR4. The stand out features in this kit over the street kit is that we have included limiting straps and Proud Rhino 2.5” Lift Rods. With the bump-stop spacers, you gain additional down travel and may run the risk of over...
lucky8llc.com