E8X/E9X Rear Suspension Bundle

Take Control of Your Vehicle’s Performance with Race-Engineered Rear Suspension Arms

Upgrade your vehicle’s handling with our complete set of race-proven rear suspension arms, featuring Toe, Camber, and both Guide Arms. After extensive development and rigorous testing at GridLife racing events, these suspension arms have been pushed to their limits—proving their durability even in the harshest racing conditions, including high-impact collisions and airborne moments.

Check out the Instruction Manual [HERE]

Check out our optional Tool Kit (pictured) for effortless adjustments [HERE]

Fed up with suspension arms that wear out or seize? We were too. That’s why we developed the most reliable link system on the market, crafted from true motorsport-grade materials. This is an investment built to last, and with spare parts [HERE]  and boot kits [HERE] readily available, your suspension will be ready for anything the road throws at it.

Why Choose Solid Arms?

In certain positions, factory-installed arms offer no adjustability. In these cases—like the Guide arms— we make them solid, reducing complexity and the risk of misalignment. The result? A lighter, stronger, and more cost-effective solution that enhances performance while keeping your suspension geometry intact.

Camber Arm Versions

• Race: Camber arms designed for adding more camber to lowered race vehicles
• Drag/Drift: Camber arms designed for setting less camber, for drag and drift cars. 

Billet Toe-Stud Option

When pushing BMW rear suspension hard on track, we’ve seen a common failure point: the OEM outer toe arm fastener. The factory bolt operates in a single-shear configuration, and after repeated abuse it can loosen, and eventually, fail entirely. Our new stud kit is compatible with our adjustable toe arms for maximum strength while jumping curbs. 

Premium Construction for Maximum Performance

Crafted from billet 6061 aluminum, these arms are engineered for strength without the weight penalty. Featuring huge Heavy-Duty FK Bearings—made in the USA—these components last 3 to 4 times longer than standard bearings. Zinc-coated 4140 steel barrel adjusters further enhance durability and performance.

Enhanced Handling and Cornering Stability

By eliminating rubber joints and bushings, our suspension arms dramatically reduce deflection, providing sharper, more consistent handling. This is especially beneficial when running wider, high-grip tires. By replacing almost all of the rubber bushings in the rear suspension, this kit delivers a firmer, more direct connection—improving cornering stability and suspension response.

Complete Kit with Eccentric Lockouts

The kit includes all the high-quality hardware you need, along with eccentric camber lockout plates for a secure installation. When using stock arms, toe and camber adjustments rely on eccentric bolts, which can slip under high loads, causing unwanted changes in alignment. With our adjustable links, you can eliminate this eccentric system by using our provided hardware and zinc-coated lockout plates to secure the suspension geometry. 

Wide Range of Adjustability for Any Driving Style

Whether you're drifting, drag racing, or tearing through canyon roads, our adjustable camber and toe arms offer a wide range of alignment options to match your driving style. Enjoy greater control and precision, no matter the conditions.

Less Maintenance, More Driving

Our suspension arms feature Heavy-Duty FK Bearings with a Teflon liner, providing a service life that’s 3-4 times longer than standard spherical bearings. Built for high misalignment and smooth, bind-free operation, these bearings are crafted from heat-treated 52100 steel and chrome-plated for extra durability. Paired with the PTFE-lined alloy steel race to reduce friction and block dust, these bearings are also easy to replace when needed, ensuring minimal downtime and more time on the track.

Includes:

4x Upper and Lower Guide Arms

2X Camber Arms

2X Toe Arms

2x Optional Sway Bar Links

2x Optional Stud Kit

The items installed or applied to vehicles are intended strictly for off-road use only and track vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use under Environmental Regulatory Agency (ERA) laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free to contact us here with your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across the continental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.