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SuperSprings mounting kits exist for one job: preloading the installed SuperSpring so it stays silent when the truck or RV is running empty. The mounting brackets act as fulcrum points under the spring, while shackles at each end secure it and let it pivot as load transfers onto the spring.
The kit bolts to your vehicle's existing spring pack using the included U-bolts, cross plates, washers, and self-locking nylon nuts, so no drilling or modification is required. It's a maintenance-free installation - fit it once and it stays put.
Note: this is the MTKT kit, built for spring packs measuring up to 2-3/4" tall above the axle (4" U-bolts). If your spring pack measures taller than that, SuperSprings' MXKT kit with longer U-bolts is the correct fit instead.