Rear sag

[Hilux2005]

I got a dual cab and put one of those aluminium gull wing toolbox on the back but not the full length it’s only 700mm wide but I have noticed the rear suspension on the low side and that’s with the box empty. What would u recommend to lift the rear to level it out? What’s people’s opinion on the Ironman load plus?

[HK1837]

Ultimate. After using them I wouldn't go anywhere else. It is normally the front that sags though.