Firestone's R4Tech System is perfect for haulers and towers that want maximum performance and handling in any driving conditions, loaded or empty. The R4Tech senses when suspension sagging occurs under load and automatically compensates for it. It also improves the ride quality when empty or unloaded. This kit is equipped with air springs, softer leaf springs, custom valved Rancho RS9000 load-adaptive shocks, compressor, trailing links, J-Springs, hardware, fittings, air-line and instructions.
Please tell us about your vehicle to ensure proper fitment.