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.

 

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 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.

Your assigned suspension expert will confirm all the details for your booking. Your parts will then be delivered to your closest Whiteline workshop and an installation date will be booked based on your preference. You then bring your car on the booking date and Whiteline will manage the installation for you.

Installation includes full product installation by a qualified suspension technician, a full wheel alignment, a complete suspension check, a visual brake inspection, and a complete report. We also offer a complimentary 1000km check-up service, which includes a suspension check and any retention work, your alignment and tyre wear will also be checked. If we find that anything needs to be amended during our 1000km check, we will carry out this work free of charge. This includes a wheel alignment, if required.

Throughout your order, installation, and service. You will be kept up to date every step of the way. Whiteline offers this service to ensure you get the best possible experience.