If you have the user manual for the Trooper Nitro SCT 4X4, this items is lister there as part number 30357. All the screws you need are already included so all you have to do is remove the old shock tower on both side (this works both front and back), remove the body post then install everything else back to their respective position. If HK ever think about providing alu body post, I would strongly suggest not to get it as it would make the frame too rigid. This is for one side only so if you want to do both front and back then you would have to buy two sets of this.