Dually applications will require different rear 3-7/8" I.D. u-bolts
Will not fit vehicles manufactured before 3-1-1999 with 5/8" track bar bolt head size.
Vehicles equipped with 2 piece rear driveshafts may require the carrier bearing to be lowered.
Trucks equiped with gas engine may achieve a slightly higher front stance.
If truck is equipped with curved/radiussed style front ubolts order kit # F1. If truck is equipped with square style front ubolts order kit # F40
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