The Mounting Hardware Kit for the Hellwig Load Pro (LP) helper springs include zinc-plated hardware and brackets and is required to be purchased with every LP-25 and LP-35 leaf helper spring kit for proper installation. These kits are vehicle specific to allow the spring kits to mount with no modification.
Load Pro Install Kit Ford 11-21 F250/F350 16-21 F350/F450 Pickup Dually 2WD/4WD and 16-21 F450/F550 Super Duty Cab/Chassis w/3in. Springs. See Vehicle Fitment.