1999-2009 - 54 Inch Axle Spacing
Second design - With center stud and dimples (1999-2009)
Bolts fastening the upper rubber bolster to the U-bolt plate have been upgraded to 9/16 inch
Where required, drill out early design 1/2 inch bolt holes to current design 9/16 inch
1999 Vehicles may have either first or second design springs
54 inch axle spacing