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Adding bump stops to our Camburg Toyota 4-Runner/FJ long-travel kit or stock length lower control arms is easy with our Slapper Bump Stop mount kit and Camburg KINETIK series 2.5 bump stops. This kit also comes with weld-on mounts to support the front upper control arm mounts. Adding a bump stop adds a ton more control and bottoming resistance. This allows for a soft plush ride through the small stuff that doesn’t bottom out easily through the bigger hits and g-outs. This is a great add-on that makes a significant improvement off-road without taking away from ride quality on the street. Why a slapper arm setup you ask? The main benefit is it allows the air bump to strike further outboard on the lower arm making it much more effective and efficient. We’re able to keep the motion ratio geometry consistent through the bottoming out travel so there is constant contact with the lower arm and the bump stop isn’t swiping the lower arm. The bump stop only comes into play toward bottoming and allows free movement in the “ride zone" so the suspension is more active in that range. With the slapper arm design, we’re also able to incorporate a custom rubber pad to reduce noise on contact. Our Camburg KINETIK series 2.5 x 2 slapper bump stops work more like an air shock than your typical bump stop that blows through the travel. Last but not least, it’s a really cool design that just works. The slapper arms are CNC machined from billet 6061 aluminum, Type III hard anodized black and pivot on bearing bronze bushings. We supply aircraft AN bolts for the upper and lower mounts that have the proper grip/shoulder length for maximum strength. Mounts come raw as they need to be welded on. We recommend spraying them with black Steel-IT after welding.