Front Strut Tension - Arm Assembly to Suit BMW M2, M3, M4 F80

Benefit Note: The Whiteline KTA285 front tension strut arm upgrade is a purpose-built solution for drivers who want sharper braking response, improved turn-in, and added front-end adjustability without sacrificing street manners. Designed to address the significant loads placed on the front tension strut (also known as the thrust arm) under braking and corner entry, this upgrade delivers tangible performance gains where it matters most.
Factory rubber bushings are intentionally soft and open in design to allow multi-axis movement during steering, but under heavy braking they compress and release, allowing unwanted arm deflection. The result is reduced stability, inconsistent braking feel, and tire skip—issues that are amplified when ABS is engaged or the car is driven hard. Whiteline’s upgraded arm and bushing solution dramatically reduces this compliance, keeping the suspension geometry stable and the tire planted under load.
At the heart of the system are offset performance synthetic elastomer bushings, which increase caster and camber for improved straight-line stability, enhanced steering feel, and stronger front-end grip on corner entry. This added adjustability allows enthusiasts to dial in a more aggressive alignment without the need for additional hardware, making it equally at home on a fast road car or a dedicated track setup.

Product Stock

Please be advised that our stores do not hold any stock. In order to make sure things go as fast as possible you can purchase your parts online. If you would like to have your parts installed by us please choose Click & Fit at the checkout.

You can use the shipping calculator to find your shipping costs, your closest pick up or install locations. The shipping calculator will also show all shipping and installation prices. Shipping is free if you choose to get your item installed by us.

When our product stock levels are low, or current stock is allocated to orders, our website may show an ‘in-stock’ status when in fact the item might be sold out. We will advise within 48hrs; stock availability, order status and shipping details.

Delivery Methods

1. Select “Click & Fit” as a delivery method during the checkout process and you will be given a special fitted price to have both the product delivered and installed. A suspension expert will be assigned to your order, who will organise everything for you and will help you every step of the way. You can sit back and relax, knowing that your car is going to be looked after by suspension experts.

2. Select “Free Pickup” as a delivery method during the checkout process and you will be given free delivery to your nearest Fulcrum outlet where you can collect the parts. We will text and email you all your tracking details. 

3. Select “Deliver to Door” as a delivery method during the checkout process and we will deliver your order direct to your nominated delivery address. We will text and email you all your tracking details. 

Shipping

We offer FREE shipping to all metro areas (excluding WA, TAS and NT).

If you live on the Australian coast, that does not mean you are subject to free shipping.

Express shipping times and free shipping times are only to be counted once the order has been shipped from our warehouses. Our free shipping and express shipping services both have the same order processing times. We first have to raise the order, then we send it to one of our warehouses for processing and once ready it will be shipped from the warehouse. The difference between express and free shipping services, is the time it takes for the item to be transported from our warehouse to your address.

Our free shipping policy is determined by densely populated metro locations and the viability of distance travelled from our distribution centres. We are constantly expanding our warehousing, so areas covered by free shipping are subject to change. See our shipping policy here.

Returns

We guarantee the fitment and quality of our products, but if you choose to return an item we offer a generous 60 day returns policy. See our returns policy here.

Warranty

All products sold by Fulcrum Suspensions are covered by a national warranty. This products warranty is subject to conditions from the date of purchase, unless otherwise stated on the item.

Warranty claims must meet certain criteria and be sent to Fulcrum Suspensions with a receipt to be eligible for a refund. See full warranty claim criteria here.