4 Inch Component Box With Dual Rate Long Travel Coil Springs Skyjacker Air & Fuel - Intake & Air - Idle Air Control Valve These bad boys are tough

These bad boys are tough enough to take on anything you might encounter on or off the trail

Easy Installation: Bolt-on design for a hassle-free upgrade

Safe for engine bay mounting - IP67-rated enclosure

MSD Ignition Controls are easy to install

If you plan on using an aftermarket EFI system that fires sequentially

4 Inch Component Box With Dual Rate Long Travel Coil Springs Skyjacker Air & Fuel - Intake & Air - Idle Air Control Valve These bad boys are toughSkyjacker specifically engineered a progressive 2 stage dual rate long travel coil. First Flex Rate stage delivers a comfortable ride with the ability to flex\expand during full articulation as the suspension drops (full droop). This keeps the coil springs seated in the upper coil mount bucket and the tires in contact with the terrain. Second Ride Rate stage only engages after compression past Flex Rate. Shocks are a key link in between the chassis