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Description
Synergy 4170-60 Heavy-Duty Ball Joint Set (Smooth)Upgrade the ball joints in your vehicle with the Synergy 4170 60 Heavy Duty Ball Joint Kit from GAP. These ball joints use a metal on metal bearing design, unlike the factory (plastic nylon bearing design), to improve durability and performance. A must for vehicles with lifts and larger tires that see off road use. Get rid of that steering wander and play caused by loose or worn out ball joints. While Jeep may have updated the JL JLU and JT steering
Upgrade the ball joints in your vehicle with the Synergy 4170-60 Heavy Duty Ball Joint Kit from GAP. These ball joints use a metal on metal bearing design, unlike the factory (plastic nylon bearing design), to improve durability and performance. A must for vehicles with lifts and larger tires that see off road use. Get rid of that steering wander and play caused by loose or worn out ball joints. While Jeep may have updated the JL / JLU and JT steering knuckle to use a dual load bearing upper and lower ball joint, they still kept the problematic nylon inner liner which is prone to premature wear. These Heavy Duty Ball Joints feature the latest design used in other ball joint applications with our proven design that are sure to stand the test of time.
(2) Lower Ball Joint
Knurled ball joints are required when replacing ball joints that have enlarged the axle end forging bores
It is up to the installer to verify the proper ball joint style is being used.
Features:
- Fully Greaseable Metal On Metal Design For Prolonged Life
- Compatible With All Aftermarket Axle Shafts (Including RCV's) With No Modifications Needed
- Ball Joint Housing Is Manufactured From 1045 High Carbon Alloy Steel For A Strong, Smooth, Bearing Surface
- Ball Joint Dust Boots Are Made From An Industrial Grade, Wear/Tear Resistant Black Nitro-Butyl Rubber (NBR)
- Ball Joint Stud Is Manufactured From Induction Heat Treated 4140 Chromoly Steel For Maximum Strength & Reliability
- Ball Joint Bearing Race Is Manufactured From Sintered Graphite & Oil Impregnated Bronze For A Strong, Smooth, Bearing Surface
- Ball Joint Bearing Surface Area Is Considerably Larger Than Stock Due To Elimination Of The Inner Nylon Liner For A Longer Lasting Joint
- 12 Month Unlimited-Warranty
4170-60 Heavy-Duty Ball Joint Set Includes:
(2) Upper Ball Joint(2) Lower Ball Joint
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.Knurled ball joints are required when replacing ball joints that have enlarged the axle end forging bores
It is up to the installer to verify the proper ball joint style is being used.
Part Number 4170-60 Includes (2) 4170-01
Synergy High Performance Grease (4119) recommended.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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★★★★★ 5
Excellent style and quality for price
Color: Grey Blue, Size: Medium
Very nice quality and affordable price. Fabric is soft and smooth, very few wrinkles after washing and drying and easy to iron. Seems durable for machine washing and drying. Fits true to size.
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Reviewed in the United States on January 27, 2026
★★★★★ 4
... size runs small
Color: Army Green, Size: XX-Large
It's a great dress shirt ... (size runs small, so order one sze up) ....wore to a wedding and received more than a dozen compliments on this shirt...also looks good tucked or untucked, highly recommend...👍🏼👍🏼
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Great Quality
Color: White, Size: Large
This company is just the best not only there shirts but everything they sell is great quality and perfect fits each and every time and the deals are even better I highly recommend
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Best dress shirt ever
Color: Denim Blue, Size: Large, Color: Denim Blue, Size: Large
The fit is perfect. I really like the trimming down the button line.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Nice style
Color: Denim Blue, Size: X-Large
Perfect fit
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Reviewed in the United States on April 21, 2026