2018-2025
2007-2018
1997-2006
1987-1995
1976-1986
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Teraflex High Steer Knuckle Kit for 4+ Inch Lift (07-18 Jeep Wrangler JK)Find parts that fit my vehicle
Item J123550
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M-F 8:30A-11P, Sat-Sun 8:30A-9P
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5 Reviews
Our Price
$614.99 pair
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features
- High Steer Knuckle Kit for 4-Inch Lifted Vehicles
- Eliminates Weaknesses of Stock Steering Knuckles
- Maintains Steering Geometry Angles
- Increased Tie Rod to Ground Clearance
- Cast HD Ductile Iron
- Black Powder-Coat Finish
- Direct Fit Replacement
- Reuses Factory Hardware
- Welding Required
- Requires Aftermarket Wheels with 4.50-Inch Back Spacing or less (or Offset Wheel Adapters)
- Requires Complete HD Flipped Drag Link or Flipped Drag Link
- Limited Lifetime Warranty
- Fits 2007 to 2018 Jeep Wrangler JK Models
Description
Improves Performance and Handling. If you have a lifted Jeep, the Teraflex High Steer Knuckle Kit for 4-plus-inch Lift is a great investment. It helps improve the Jeep Wrangler JK's off-road performance by eliminating the stock knuckle weaknesses with its reinforced design. Furthermore, the High Steer Knuckle kit also maintains the proper steering geometry angles for superior highway drivability.
Superior Construction. Like other Teraflex products, the High Steer Knuckle Kit is designed and built for performance and durability. Featuring a reinforced design and heavy-duty ductile iron construction, these knuckles can withstand extremely rugged conditions.
Some Welding Required. The High Steer Knuckle Kit is a direct fit, but requires some welding for superior off-road strength. It also requires aftermarket wheels with 4.50-inch backspacing and either an HD or standard Flipped Drag Link.
Limited Lifetime Warranty. The High Steer Knuckle Kit is warrantied to be free of defects in materials or workmanship for as long as the original purchaser owns the vehicle the product was originally installed on. Exclusions will apply.
Application. The Teraflex High Steer Knuckle Kit for 4-plus-inch Lift is designed for lifted 2007 to 2018 Jeep Wrangler JK models.
Fitment:
- 2007 Jeep Wrangler
- 2008 Jeep Wrangler
- 2009 Jeep Wrangler
- 2010 Jeep Wrangler
- 2011 Jeep Wrangler
- 2012 Jeep Wrangler
- 2013 Jeep Wrangler
- 2014 Jeep Wrangler
- 2015 Jeep Wrangler
- 2016 Jeep Wrangler
- 2017 Jeep Wrangler
- 2018 Jeep Wrangler
Teraflex 4390870
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Driver Side High Steer Knuckle
- (1) Passenger Side High Steer Knuckle
4.6
Customer Reviews (5)
Review Summary
Installation Time: Afternoon
Nov 18, 2020
2013 Rubicon - Stariharm
Installation Time: Afternoon
Perfect
Install was fairly easy and the look great. The extra clearance is nice and the drag link flip kit bolted right onto them.
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Jul 23, 2020
2012 Wrangler - BadIdea
Installation Time: Afternoon
Perfection
Perfection Easy to install puts everything where it needs to be and looks great. Unbelievable performance. Install time I’m sure would be much faster with somebody a little bit more comfortable with working on a vehicle
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
May 29, 2019
2012 Rubicon - JohnC
TERA FLEX HIGH STEER IS AWESOME
I INSTALLED THE TERA FLEX HIGH KIT ONLY PROBLEM WAS RELOCATING STEERING THE STEERING SHOCK MOUNT .
Fit 5/5
Bang For Your Buck 5/5
Jan 26, 2019
2014 Wrangler - JasonP
Great addition!
These were easy to install and raise the tie rod for better ground clearance. I reccomend installing new ball joints while installing these since your dissasembled that far anyway.
Fit 5/5
Bang For Your Buck 5/5
Oct 3, 2017
Review shared from Teraflex High Steer Knuckle Kit (97-06 Jeep Wrangler TJ)
2001 Wrangler - WarrenC
Nothing wrong with the part.
the high steer knuckle kit is fine, but getting everything we needed to make it work was a different story. we had to place sever different orders to get it right.
Fit 5/5
Bang For Your Buck 5/5
Reviews of Teraflex Drivetrain products have an average rating of 4.8 out of 5
Mar 18, 2025
Review shared from Teraflex Rzeppa High-Angle Factory Replacement CV Joint Kit (07-18 Jeep Wrangler JK)
2014 Wrangler -
Great Product Works as expected
Installed super easy after some difficulty getting the old part off the Jeep after that installation was a breeze. The instructions were easy to follow and detailed along with the video to follow.
Mar 12, 2025
Review shared from Teraflex CRD50R And Dana 44 HD Differential Cover (87-18 Jeep Wrangler YJ, TJ & JK)
2014 Wrangler - Adapters
Teraflex Differential Cover
Great quality. Seems very strong and durable. Only issue is the lower fill hole is not at the same height as the original. Otherwise very happy with the quality and it looks amazing!
Jan 17, 2025
Review shared from Teraflex Rzeppa High-Angle Factory Replacement CV Joint Kit (07-18 Jeep Wrangler JK)
2008 Wrangler - RandallP
Teraflex Rzeppa high angle cv joint
Great product Replaced stock cv joint with the teraflex boot was gone on stock cv joint
Jan 6, 2025
Review shared from Teraflex Dana 30/Tera30 HD Differential Cover; Black (76-18 Jeep CJ5, CJ7, Wrangler YJ, TJ & JK)
2011 Wrangler - StockJeep
Teraflex Dana 30 Differential Cover
I had to replace my axle oils seals so I decide to do several upgrades which included this differential cover. The fit is perfect and this thing is thick and solid. I feel like it was worth the money.
Dec 15, 2024
Review shared from Teraflex Rzeppa High-Angle Factory Replacement CV Joint Kit (07-18 Jeep Wrangler JK)
2012 Rubicon - Rockbus
Fixed my 2012 JKU
Easy to bolt on and has everything you need! Great kit and not hard to install to replace the stock funky rzeppa Joint.
Nov 20, 2024
Review shared from Teraflex Rear Track Bar Axle Bracket Kit for 2.50-Inch Lift; Right Hand Drive (07-18 Jeep Wrangler JK)
2013 Wrangler - BGunn
Right Hand Drive!!!
Worked great. This is the ONLY place to get a right hand drive track bar relocation bracket. Must have for 2.5 in lift or better. Great part, great customer service. Give them a call.
Nov 4, 2024
Review shared from Teraflex Rzeppa High-Angle Factory Replacement CV Joint Kit (07-18 Jeep Wrangler JK)
2012 - rzeppa
Teraflex Rzeppa High-Angle Factory Replacement CV Joint Kit
This item seems to be good quality and installation was easy
Nov 4, 2024
Review shared from Teraflex Front Axle Sleeve Kit (07-18 Jeep Wrangler JK)
2012 Wrangler - BlueCollarScrap
Perfect fit
I used these to hold my axle tube in line to weld after snapping the front axle. Worked great, and put gussets on the outside to make sure. Getting more for my back up axles
Oct 22, 2024
Review shared from Teraflex Rzeppa High-Angle Factory Replacement CV Joint Kit (07-18 Jeep Wrangler JK)
2010 Wrangler - Chairez30
Teraflex Rzeppa high angle CV join
Easy to install in 2 hours. So far so good, I’ll give a more detailed review in a few months. Happy with the amount of angle it allows. Most affordable option for a drive shaft upgrade.
Sep 30, 2024
Review shared from Teraflex Rear High-Angle Rzeppa CV Driveshaft for 3 to 6-Inch Lift (12-18 Jeep Wrangler JK 4-Door)
2016 Wrangler - Nakia
Great product
Factory one came out; this one went in. No issues, got 3k on it as of now
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