Synergy Manufacturing D30/D44 Heavy Duty Ball Joint Set (Upper & Lower) - 4120-04

TECHNICAL DETAILS

• Set has one upper and one lower ball joint, two sets required per vehicle
• New and improved ball joints
• Compatible with all aftermarket axle shafts (including RCV) with no modifications needed
• Fully greasable metal on metal design for prolonged life
• Ball joint bearing surface area is considerably larger than stock due to elimination of the inner nylon liner for a longer lasting joint
• Ball joint housing is manufactured from sintered graphite, bronze, and 1045 steel for a strong, smooth, bearing surface
• Ball joint stud is manufactured from induction heat treated 4140 steel for maximum strength and smooth operation
• Ball joint dust boot is made from wear/tear resistant black nitro-butile rubber (NBR)
• 12 month unlimited-warranty (see warranty information)
• Synergy high performance grease (4119) recommended
• Notes: Metal on metal ball joints require a small break-in period of typically 100-500 miles to fully "seat" the bearing surfaces. During this time the steering may feel "sticky" or slow to "return to center". Once broken in, the steering will be smooth and tight.