Kryptonite Bolt-In Upper Ball Joint for Aftermarket Upper Control Arms on Chevy/GMC 1500 Trucks (KR6136)
Whether you’re servicing your Kryptonite KRUCA99, KRUCA12, or KRUCA19 Upper Control Arms or replacing a worn ball joint in another aftermarket suspension system, this heavy-duty bolt-in ball joint is built to handle far more abuse than conventional replacements.
Designed around the industry-standard Moog K6136 mounting pattern, it is a direct replacement for the Kryptonite control arm kits listed above and many aftermarket upper control arms from Cognito, CST, FTS, Fabtech, and other manufacturers using a bolt-in upper ball joint.
A massive ball stud provides exceptional strength while allowing increased articulation for leveled and lifted trucks. The thick heavy-duty rubber boot keeps contaminants out, while Kryptonite’s exclusive grease relief port makes routine maintenance simple and helps extend service life.
Important fitment details:
Direct replacement for Kryptonite KRUCA99, KRUCA12 & KRUCA19 Upper Control Arms.
Compatible anywhere a Moog K6136 ball joint is specified.
For 2007-2018 trucks, these ball joints only fit where cast steel control arms were originally equipped. They will NOT fit stamped steel or aluminum factory control arms. See image below for identification.
- Forged High-Strength Housing – Optimized HD forging increases articulation and provides added clearance to prevent binding at full suspension travel.
- Heat-Treated Chromoly Ball Stud – Significantly stronger than factory studs and highly resistant to bending under heavy loads.
- Metal-on-Metal Internal Design – Eliminates weak factory-style internals for long-term durability in towing, off-road, and high-load applications.
- Powdered-Metal Internal Races – Designed for extreme wear resistance and consistent performance over the life of the joint.
- Coil-Spring Preload System – Maintains consistent internal tension as the suspension cycles, reducing looseness and extending service life.
- Premium Class 10.9 Hardware – Includes Kryptonite-supplied high-strength mounting hardware for secure, reliable installation.
- Greaseable By Design – Apply 4–6 pumps during installation, then maintain with approximately 1-2 pumps every 5,000–7,000 miles. Designed to purge contaminants without overfilling the boot.
- Corrosion-Resistant Finishes – Black E-coat housing with a gold zinc-plated cap for long-term corrosion protection and a premium appearance.
- 1x Kryptonite Bolt In Ball Joint with mounting hardware
- 1999-2006 Chevy Silverado 1500
- 1999-2006 GMC Sierra 1500
- 2007-2018 Chevy Silverado 1500 (OEM Cast Steel UCA ONLY)
- 2007-2018 GMC Sierra 1500 (OEM Cast Steel UCA ONLY)
- 2019+ Chevy Silverado 1500
- 2019+ GMC Sierra 1500
Please note that actual products may differ from images shown on our website. While we strive for accuracy in product listings, manufacturers may make changes to design, contents, color, or packaging without notice. Product images are for illustrative purposes only and may not represent the exact item you receive.
By purchasing, you acknowledge and accept that variations may occur and release OCDiesel from any liability related to product appearance differences.
Order Processing Time:
Orders are typically processed within 24-48 hours after the order has been placed.
Custom or special order items may take longer to process, typically 3-5 business days depending on the product and customization required.
Shipping Methods:
Standard Shipping (3-7 business days - location dependent)
Express Shipping (1-2 business days- location dependent)
Packaging:
All parts are securely packaged to better prevent any damage during transit. Fragile or high-value parts will be packaged with additional protective materials, such as bubble wrap or foam padding.
Shipping Rates:
Shipping rates vary based on the size, weight, and destination of the package. You can view the estimated shipping costs for your order during the checkout process before placing your order.
Order Tracking:
Once your order has been shipped, you will receive an email with the tracking number and carrier information. You can also track your order status by logging into your OCDiesel account.
USA Shipping:
We ship to the USA! (Except California) Please note that USA shipping rates and delivery times may vary based on destination. Customers are responsible for any customs fees, import taxes, or additional charges that may apply.
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