Tesla Model X / Model X Plaid (2021+) Billet Rear Trailing Arm Set (Lower Aft Link)

Yes. They are made for the 2021+ Model X and Model X Plaid, which use an all-new five-link rear suspension that we re-engineered for performance driving. The set replaces Tesla part number 1420452-99-C, the rear lower aft link. Confirm your car is a 2021 or newer Model X before ordering.

No. These use sealed spherical bushings specifically chosen for silent operation alongside the precision gain, so you get tighter response without the rattle or harshness some solid bushings bring. The sealing also protects them for daily-driven durability. It is a street-friendly way to firm up the rear.

Yes. Our Model X Plaid suspension program began in June 2021 with our race car Dark Helmet, and it brought home a Pikes Peak class victory and multiple production-based EV lap records. Development starts with precision 3D scanning of the suspension to build a digital model, then real racing and street use on our own cars before public release.

Rear suspension link work is within reach for an experienced DIYer with a lift and the right tools, but the bushings come already mounted to simplify the job. If you would rather have it done, our Hawthorne team or an authorized installer can fit them. An alignment afterward is a good idea any time you touch rear links.

You can start with the trailing arm on its own, but we recommend pairing it with the full rear suite for the best result. That includes the Billet Rear Traction Arm Set (Upper Fore Link), the Billet Rear Lower Arm Set (Lower Fore Link), and the adjustable camber and toe arms. Doing the set gives a consistent, fully re-engineered rear end.

A like-for-like OEM replacement brings back the same soft rubber bushing and the same eventual slop. This billet arm upgrades the material to stronger, lighter aluminum and swaps in sealed spherical bushings for lasting precision. You fix the problem instead of resetting the clock on it.

Unplugged Performance backs its parts and installs against defects in materials and workmanship, with coverage that applies when the component is fitted by us or an authorized partner. Combined with the racing development history and lap records behind these links, that support is meant to give confidence that they are the best money can buy. Contact our service team to start any claim.

Installing them does not automatically void your Tesla warranty. Tesla would have to show, under the Magnuson-Moss Warranty Act, that the arms caused a specific failure to deny a related claim. Because these are engineered for the 2021+ platform and can be professionally installed, the practical risk stays low. Keeping your factory links lets you revert if you ever need to.

The lower aft link locates the rear wheel fore and aft as the suspension moves, so its stiffness directly affects how precise and planted the rear feels. This billet set replaces the standard link with a stronger, lighter billet aluminum version running sealed spherical bushings. The result is sharper handling feel and quieter, more durable operation than the soft factory bushing.

They are CNC-milled from 6061 aluminum for maximum strength while saving weight, and they are FEA-simulation optimized for static, dynamic, and fatigue strength. The sealed spherical bushings give precision and durability with silent operation. This is billet construction, not a rubber-bushing stamped part.

Tesla’s warranty covers factory-installed parts, but it does not automatically void your warranty if you install aftermarket components like Unplugged Performance brake kits. Under U.S. law (Magnuson-Moss Warranty Act), Tesla must prove that an aftermarket part caused a failure in order to deny warranty coverage. Our parts are engineered to work harmoniously with Tesla OEM Brake systems and can be professionally installed by Unplugged Performance in Hawthorne, CA or by an authorized installer to minimize risk. That said, any damage directly caused by misuse or improper installation may not be covered. We recommend retaining all factory parts so you can revert to stock if needed. Many Tesla owners enjoy peace of mind by using Unplugged Performance products, which are extensively tested and installed by certified professionals. If warranty concerns are top-of-mind, our team can help clarify compatibility and installation best practices to ensure a worry-free experience.

Unplugged Performance offers a comprehensive warranty on all parts and installations performed by our certified technicians. Warranty coverage applies to defects in materials and workmanship on items including lowering springs, coilovers, big brake kits, brake pads, stainless steel brake lines, shocks, and more. Should any covered part fail under normal use or display premature wear, we will repair or replace it at no additional cost—assuming the component was installed by us or at one of our authorized partners.

This warranty is valid for 2 years or 24,000 miles, whichever comes first, excluding consumable products like brake pads, rotors, and tires, starting from the installation date. Coverage extends to labor for warranty repairs when performed by Unplugged Performance or an authorized installer. It does not cover damage resulting from misuse, accidents, off‑road use, improper installation not done by us, or modifications that aren’t factory-approved.

To file a warranty claim, simply contact our service team. We’ll guide you through inspection, shipping (if needed), and repair or replacement logistics. transparencia and top-tier support are what you can expect from Unplugged.

Installing aftermarket parts does not automatically void your Tesla warranty. Under the Magnusson-Moss Warranty Act (www.sema.org/sema-enews/2011/01/ftc-validates-right-to-install-aftermarket-parts), a manufacturer cannot void your warranty simply because you installed aftermarket parts. Tesla must prove that the aftermarket part caused the specific failure in question to deny a warranty claim. UP recommends retaining all factory parts to allow reverting to stock if needed. 

To find authorized installers or retailers of Unplugged Performance products in your area, please use the form on our website to provide your location details. This will help us connect you with an authorized installer nearby. You can find the form here.

Unplugged Performance processes orders quickly, typically within 1–2 business days after placement. For U.S. customers, orders under $50 usually ship via FedEx SmartPost with an estimated delivery time of 2–7 business days. Larger items like body kits or bumpers may ship via freight carriers with curbside delivery; customers will be contacted to schedule a delivery window. International shipping is available to most countries, with shipping costs calculated at checkout. Delivery times abroad vary, generally ranging from 5 to 16 business days depending on destination. Import duties or taxes are the customer’s responsibility. To ensure a smooth shipping experience, provide accurate contact information during checkout. For specific questions or shipping quotes, Unplugged Performance’s support team is available to assist.