Box Rocket
SILVER Star
In case anyone reads your first sentence incorrectly, ICON does NOT = Slinky even though Slinky shocks are built by ICON. (i know that's what you were saying @Delta VS )
To maybe add a little clarity to your other comment, there are Slinky kits designed specifically for lighter rigs too, not just heavier ones. But there are better options for heavier rigs with the Slinky kits than with Icon. For example, the medium rate Slinky coils and either the Stage1 shocks or the Stage4 shocks would work very well for a light rig and the coils can be had in either a 50mm or 75mm lift. The Stage1 shocks are the equivalent of a setting of 4 on the Stage4 shocks (adjustable from 1-10, 1=softest, 10=stiffest). So even with the bigger shocks you could soften up the ride on a lighter rig even more than with the stage1 shocks.
But for heavier rigs, the Slinky kits are one of the best I've seen personally, with either heavy or extra heavy spring rates along with the ability to stiffen the shocks up to better control the weight (assuming the Stage4's are used.) My personal experience with OME J's that I ran for years (and are OME's heavy rate coils) is that the back of the rig sagged at least a couple inches when loaded. When the truck was loaded up it wallowed in turns with significant body roll. When changing to the heavy rate Slinky coils, the difference was immediately noticeable with much flatter cornering and no noticeable sagging with even heavier loads than I typically had with OME. I've been able to observe @mryanangel offroad in his cummins 80, which is VERY heavy, on both the Slinky heavy coils and more recently the extra heavy coils. Considering the very heavy rig the heavy coils controlled the rig surprisingly well from what I observed. I think he would say the extra heavies have been even better and that is what I've also observed after being on trips with him and pushing the rigs and pretty good speeds. I don't think the Icon coils would perform anywhere close to that with that kind of weight.
I have since upgraded the rear swaybar which has also improved handling in corners and on the highway. On the highway sway is non-existent. Fast speeds offroad and in corners the truck stays much flatter which feels more "in control" than with a truck that leans badly in corners. Corner turn-in is also improved with the stiffer swaybar and the back end will step out in a predictable way when pushed hard in corners. But the best thing is that the understeer is reduced so I don't feel like I'm plowing forward/wide on fast corners. I stiffer rear swaybar would improve handling of any rig whether on OME, ICON, Slinky etc.
@RevFZJ80Don't think you will actually see much difference performance-wise between the 2.0 shocks. Slinky coils might be worth the extra with your weight though (no experience) as it sounds like you will end up 800 - 1000# heavier than me. 6500# GVW is always my target but I'm a backpacker and have a spreadsheet (of course)
The Icon 2.0's and the Slinky 2.0's will have similar performance. But as you add weight, it would be well worth it to look into upgrading to the adjustable 2.5 remote reservoir shocks. They will handle extra weight much better than the 2.0. You probably already know this but the remote reservoirs themselves won't improve performance in a noticeable way. They just allow for more oil capacity which will keep the shocks running cool longer. This will pay off on longer days offroad where the shocks will get hot. On past trips when we've had OME equipped rigs with us, they had severe shock fade as the day wore on and there was very little shock dampening. You could see the rigs bounce along like they didn't even have shocks. This forced them to reduce speeds pretty significantly. Even with the Stage1 Slinky shocks, I experienced some shock fade on long days but to a lesser degree than I had with OME shocks. Not sure of what caused the difference there since oil capacity is similar.
