Our Camburg coil spring preload kits are designed to lift and level the front of your '17-20 Gen2 Ford Raptor while maintaining the factory ride quality with the OEM Fox coilovers. These collars preload the coil spring, providing increased compression travel for off-roading. They are CNC machined from aerospace quality 6061-T6 aluminum and come in black, gold, KINETIK gray, and red versions. Installation is easy, but requires removing the coilovers from the truck and using a heavy-duty spring compressor. We offer two lift options: 1.5" for leveling with 35" tires and 2" for larger 37" tires. Please note that these collars are not compatible with aftermarket coil springs on the OEM stock shocks. For the '19-20 models with electronic FOX Live Valve suspension, slight modification of the plastic wire retainer is necessary. Additionally, when using the factory OEM 17" wheel or positive offset wheel with larger tires, a 1/4" - 3/8" wheel spacer may be required. We recommend a zero offset wheel for optimal performance.