We have updated our long arm system to include the following new items:

Progressive coil springs front and rear. These have a great ride both on and off-road.
New front and rear trackbars using our D2 bushings, for grease free operation.
New control arms using our D2 bushings, these bushing help absorb road harshness, vibration, and noise. They are also fully rebuildable!
Easily fit a 37" tire with this system.

Check with your favorite retailer on pricing.