JC4558KSBLT – 4.5 in. Front Dual Rate Long Travel Lift System W/Rear Springs
 
DUAL RATE-LONG TRAVEL coil springs expand during articulation as suspension droops to keep the tires in contact with the ground much longer than a single rate resulting in a smoother ride while maintaining the coil in the upper coil bucket even at full droop. The 2nd rate (lower coils) only engage after compression past the 1st rate for consistent control and stability during body roll and heavy off-road suspension movement. Kit includes Front Dual Rate Long Travel Coil Springs, Front Bump Stop Spacers, Front Lower Control Arms, Front Sway Bar End Links, Front Adjustable Track Bar, Rear Shackles, Rear Leaf Springs, Front and Rear Black Max Shocks.