Synergy Adjustable Ball Joint Kit Non-Knurled Front for 2007-2018 Jeep Wrangler JK/JKU

Benefits:
Fully adjustable and rebuildable lowers are designed to last the life of the vehicle, without ever having to press them out of the inner-c
On and off road tested for more than 5 years and 500,000 miles providing time tested components you can trust
Best in class price to performance ratio
Compatible with all aftermarket axle shafts (including RCV’s) with no modifications needed
Fully greaseable metal on metal ball Joint bearing surface has considerably larger area than stock due to elimination of the inner nylon liner for a longer lasting joint
Heavy duty, heat treated stud prevents unwanted movement and premature failure
Improves road manners and corrects sloppy steering
Features:
Patent Pending Lower Ball Joints are adjustable and rebuildable so they always have the correct amount of preload
Knurled and non-knurled ball joint housing options to fit any vehicle
CNC machined lower ball joint surfaces from 4140 steel, heat treated, induction hardened, and ferritic nitrocarburized for extreme wear resistance
Heavy duty, extra large 4140 steel stud for maximum strength and reliability
Low profile dust boots are made from thick nitrobutile rubber (NBR) protect the joint from contaminants and eliminate any chance of tearing
Limited Lifetime Warranty
Zerk fittings included for trouble-free maintenance
Includes:
4127 4127KN
(2) Upper Ball Joints
(2) Lower Adjustable Ball Joints
(1) Ball Joint Hardware Kit for all joints
(1) Ball Joint Adjuster Wrench to set pre-load
(2) Knurled Upper Ball Joints
(2) Lower Adjustable Knurled Ball Joints
(1) Ball Joint Hardware Kit for all joints
(1) Ball Joint Adjuster Wrench to set pre-load

Notes:
Synergy 4119 High Performance Grease recommended
Knurled ball joints required when replacing knurled ball joints that have enlarged the axle end forging bores
Non-Knurled ball joints recommended for replacing non-knurled ball joints
Due to these ball joints being tight tolerance, metal on metal ball joints, proper fitment is critical. Using the wrong style of ball joints can cause significant steering issues. We always recommend installing non-knurled ball joints until non-knurled ball joints are no longer a press fit into the axle end forging bores. If your axle end forging bores have been enlarged to the point that non-knurled ball joints are no longer a press fit, knurled ball joints are required.
Use of the improper ball joint style for the axle housing voids our lifetime warranty. It is up to the installer to verify the proper ball joint style is being used.
Compatible with RCV axle shafts
Rebuild Kits and Replacement Parts Available Here.
Limited Lifetime Warranty:
For the original purchaser, this warranty covers defects in materials or workmanship of the ball joint for the lifetime of the joint. Ball Joints are wear items and normal wear of the ball joint is not subject to this Limited Lifetime Warranty. The wear items of the ball joint will periodically need to be replaced once the adjustment in the joint is used up and are available separately as a ball joint rebuild kit. Length of time between rebuilds is subject to the use and build of the vehicle.
Installation Instructions

More information: www.p65warnings.ca.gov