2005-2007 Super Duty 4x4 Diesel 2.5" Lift Commuter System, FSP (CS-FLVL-COM-CS-05-FSP)Description The perfect comprehensive beginner level suspension setup for your Powerstroke, with front linear rate coil springs that provide an ideal leveled out stance, tighter when cornering, and react consistently throughout any compression range, making them more responsive and predictable. Paired with Carli's 2. 0 6063 Aluminum shocks with 6061 Billet rod ends to further maintain stability, control, and provide superior bottom out protection.