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Description
Synergy 4123KN Heavy-Duty Adjustable Ball Joint Kit (Knurled)Get the Synergy 4123KN Heavy Duty Adjustable Ball Joint Kit (Knurled) from GAP and upgrade your 2003 2013 Dodge Ram 2500 3500 4WD. After 5 years of development and over 100,000 test miles the Synergy Heavy Duty Adjustable Ram Ball Joints are here! This is the last set of ball joints you will ever have to buy. Tighten up your steering for good with Synergy's patent pending (# 16 020894) design which is fully adjustable, serviceable, and rebuildable
Get the Synergy 4123KN Heavy-Duty Adjustable Ball Joint Kit (Knurled) from GAP and upgrade your 2003-2013 Dodge Ram 2500/3500 4WD. After 5 years of development and over 100,000 test miles the Synergy Heavy-Duty Adjustable Ram Ball Joints are here! This is the last set of ball joints you will ever have to buy. Tighten up your steering for good with Synergy's patent-pending (# 16/020894) design which is fully adjustable, serviceable, and rebuildable without having to press the ball joints back out of the axle end forging yokes. These ball joints never have to come back out. Lower ball joint bearing surfaces are CNC machined from 4140 steel, heat treated, induction hardened, and ferritic nitrocarburized to make these the longest lasting, longest wearing ball joints on the market. Kit includes all 4 ball joints to service one truck and the adjuster tool for adjusting the preload on the lower ball joints.
Features:
Non-Knurled Ball Joint Housing
Contaminants And Eliminate Any Chance Of Tearing
Zerk-Fittings Included For Trouble-Free Maintenance
Lower Ball Joints Are Rebuildable On The Vehicle Without Removal
Hardened, And Ferritic Nitrocarburized For Extreme Wear Resistance
Lower Ball Joint Bearing Surfaces Are CNC Machined From 4140 Steel, Heat Treated, Induction
Low Profile Dust Boots Are Made From Thick Nitrobutile Rubber (NBR) To Protect The Joint From
Patent Pending Lower Ball Joints Are Adjustable So They Always Have The Correct Amount Of Preload
Best In Class Price/Performance Ratio
Designed To Last The Life Of The Vehicle
Never Need To Replace Ball Joints Again
Limited Lifetime Warranty
Contaminants And Eliminate Any Chance Of Tearing
Zerk-Fittings Included For Trouble-Free Maintenance
Lower Ball Joints Are Rebuildable On The Vehicle Without Removal
Hardened, And Ferritic Nitrocarburized For Extreme Wear Resistance
Lower Ball Joint Bearing Surfaces Are CNC Machined From 4140 Steel, Heat Treated, Induction
Low Profile Dust Boots Are Made From Thick Nitrobutile Rubber (NBR) To Protect The Joint From
Patent Pending Lower Ball Joints Are Adjustable So They Always Have The Correct Amount Of Preload
Benefits:
Tightens Sloppy SteeringBest In Class Price/Performance Ratio
Designed To Last The Life Of The Vehicle
Never Need To Replace Ball Joints Again
Limited Lifetime Warranty
4123KN Heavy-Duty Adjustable Ball Joint Kit Includes:
(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
Notes:
Non-Knurled ball joints recommended for replacing non-knurled ball jointsDue 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
Synergy 4119 High Performance Grease recommended
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.
Applications:
2003-2013 Dodge Ram 2500 4WD2003-2013.5 Dodge Ram 3500 4WD
2006-2008 Dodge Ram 1500 Mega Cab 4WD
Note: 2013 Dodge Ram 3500's were a split year for production. If your truck has radius arms use Dodge Ram 2014+ pages
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
4.3 ★★★★★
Based on 57 reviews
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Product Reviews
★★★★★ 3
Not as good as I expected
When it first came, the box fell apart as I was taking it out, and a lot of some kind of dirt or sand kept falling out all over my table and floor. I had the take the entire thing apart and thoroughly wash it.
After drying age reassembling it, I tried it on my portafilter that came with my Breville Barista Express, but, somehow, it doesn't always make the tamping level. You would think with the ridge that rests on the side of the portafilter that it would force it to remain level, but, somehow, it doesn't, at least not consistently. It also has varying lengths (heights, or depths), and a single spring tension, so you may still over tamping or under-tamp. I was expecting it would have a censor that would just detect once it reached 30 lbs of force and cut off after that, similar to a torque screwdriver, but that's not what this is.
I'll still give it 3 stars because, despite the problems mentioned above, it at least produces some amount of consistency, even if that isn't measurable; but, I can't give it 5 stars because of those issues mentioned above.
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Reviewed in the United States on January 7, 2025
★★★★★ 5
This is the one.
Size: 58.3mm, Color: Black
As an el Supremo Coffee Geek, I've wasted money on lots of different tampers. Save your money and buy this one or it's equivalent. This thing is heavy duty, solid, well-made, self-leveling, tamps at 30 pounds and is fool-proof even for fools. Also, it's a palm tamper meaning more fun and more satisfying to use as you prep the puck for your morning buzz. Buy it. You will thank me.
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Reviewed in the United States on March 30, 2024
★★★★★ 5
Super easy to use and takes the guess-work out of getting even pressure on the grounds
Size: 58.3mm, Color: Black, Size: 58.3mm, Color: Black
I have been using a hand tamper for many years and have a good idea of the pressure I am applying to the grounds in the portafilter. I honestly considered spring tampers to be a bit silly. But this tamper really does take the guess-work out of pressing the coffee grounds. The shroud helps guide the press so that pressure is applied even and flat across the surface. With the manual tamper, there will be some play when pressing, or some unevenness in pressure. This is especially true when cranking out many espressos during a breakfast party with friends. Having the spring tamper makes quick work of turning out a lot of coffees with consistency.
There are no instructions for taking this tamper apart to clean inside, and you may not really need to do that very often. After each use, just pull back the shroud (the black piece that moves up and down) and wipe off the tamper (the shiny steel part). This will help prevent grounds from working their way inside. If you do want to take it apart, it’s easy. Pull back the shroud and unscrew the tamper. It will come apart into three pieces. Wipe the pieces off and reassemble. Super quick and easy.
This tamper is very heavy. My scale shows 656 g (about a pound and a half). It fits the portafilter exactly, with no slop. Just place on top of grounds and press!. Don’t even worry about pressure, just push down all the way. Overall I had fun using this tamper versus my manual one. And since I make myself a cappuccino very early in the morning, I don’t have to be very awake to get a good pack on the grounds and get my coffee fast!
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Reviewed in the United States on January 10, 2024
★★★★★ 5
It is heavy
Size: 58.3mm, Color: Black
Item was as described and shipped promptly. It is heavy and works well with my portafilter. I haven't had it long enough to really evaluate how helpful it is.
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Reviewed in the United States on October 31, 2025
★★★★★ 5
Muy bueno
Muy bueno
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Reviewed in the United States on November 18, 2025