Lift is achieved via replacement coil springs specific to gas or diesel
engines to ensure proper lift height and factory ride quality. In order
to obtain the amount of caster correction required for 4" of lift,
radius arm lowering brackets are utilized. Other components included
with the 4" system are: front compression travel-stop relocation
brackets, track bar relocation bracket, front anti-sway bar extensions,
and a steering stabilizer bracket. Shock options include: Superlift
Superide, Superide Select Series by Bilstein (SS), or Superide Select
Series Reservoir (SSR) Shocks.

Blocks afford the best ride quality but axle wrap up is increased.
Generally, this is not a noticeable problem unless you run fairly large
tires and have a heavy accelerator foot. Add-a-leafs will reduce
wrap-up, but also firm-up ride quality. Superide rear springs ride
better than stock springs with add-a-leafs, but you lose the factory
top-mounted overloads and their extra carrying capacity. This is not an
issue with the 8" lift because of Superlift's load assist system.
Superlift Torque-Max traction bars address axle wrap up in addition to
looking trick.

Superlift's 4-link
upgrade system offers real advantages over Ford's radius arm approach.
The 4-link experiences less caster change as the suspension cycles
yielding more stable steering and handling traits in all terrain types,
on-road or off. Secondly, our adjustable Rockrunner lower links allow
infinite caster adjustment; this is especially beneficial for the truck
owner that hauls or tows since additional caster improves towing and/or
loaded "steering feel" (caster is lost as the rear squats from being
loaded). Also, the 4-link generates less bind as the suspension travels
which improves ride quality.

1. 
   Fixed length upper links made of 2" OD x .188" wall thickness DOM
   tubing and .25" steel plate. Greasable, high density Urethane eye
   bushings deform less under load which improves control.
2. 
   Rockrunner Series lower links swivel to allow bind-free operation, and
   their length can be set for infinite caster adjustment. Made of 2" OD x
   .188" wall thickness DOM tubing and .25" steel plate. Greasable,
   high-density Urethane eye bushings deform less under load and improve
   control.
3. New 4-link arm bracket attaches to existing radius arm bracket which is riveted to the truck frame.
4. 
   Factory steel-encased rubber bushings retained at link-to-axle mounting
   points to reduce vibration and shock transfer. Urethane upper eye
   bushings and factory lower bushings form the perfect combination.
5. 
   Shown with optional dual shock hoop and Superide SSR series shocks.
   Superide Standard series shocks and SS series by Bilstein also
   available.