The Prothane front coil spring isolator is a 2.5-inch lift spacer intended for 2005–2009 Ford F-250 Super Duty 4WD front applications. The description specifies a black Prothane spacer sold for the front coil spring to achieve the listed 2.5-inch lift; fitment is vehicle- and axle-specific, so confirm front 4WD Super Duty compatibility before installation.
Prothane 05-09 Ford F250 SD 4wd Front Coil Spring 2.5in Lift Spacer - Black