Synergy Manufacturing 8064-10 Coil Spring Set Jeep JK 2-Door 2.0''/ 4-Door 1.0'' Rear Lift Springs Synergy Jeep JK Rear Lift Coil Springs APPROXIMATE LIFT HEIGHT (2 DR JK): 2.0" APPROXIMATE LIFT HEIGHT (4 DR JK): 1.0" SPRING TYPE: MULTI-RATE FREE LENGTH (INCHES): 16.65 BLOCK HEIGHT (INCHES): 5.75