100% bolt on Spindle Kit that does not extend track width 
Impact struts to distribute suspension impact throughout the frame 
Structural crossmembers constructed of 1/4" thick steel for superior strength 
Heavy duty semi gloss black powder for long life and great looks 
Offset rear lift block keeps the rear axle centered 
Utilizes ductile iron steering knuckle for stock alignment 
Superior driveability both on and offroad
Included is this kit the following:

78012 8” 2015 FORD F150 4WD COILOVER KIT
78001-9 COMPONENT BOX 1 
78001-5 6.25” REAR BLOCK KIT 
78001-2 LEFT KNUCKLE/ RIGHT KNUCKLE
78001-7 2.5” EMULISION COIL OVERS
78011-24 2015 FORD F150 UPPER COILOVER BRACKET
28420 UPPER CONTROL ARMS