This shackle kit has greatly improved my truck`s braking performance .AS my tests showed, the shackle kit reduced the amount of rear-end sag when braking resulting in better stability and control. The installation was easy and straightforward with clear instructions. The durable construction of the kit ensures it will last a long time. however, the kit is not compatible with all truck models, so make sure to check before purchasing. Overall, a great investment for any automotive enthusiast looking to upgrade their brake system..