SPL Parts 2014+ BMW M2/M3/M4 (F8X) Front Lower Control Arms

SPL FLCA F8X Front Lower Control Arms for 2014-2021 BMW M2 / M3 / M4

The SPL FLCA F8X Front Lower Control Arms provide roll center, camber, and track width adjustment for the BMW F87 M2, F80 M3, and F82/F83 M4. The factory OEM front lower control arm uses rubber bushings that deflect under braking and cornering loads, allowing alignment geometry to shift dynamically and producing vague, inconsistent front-end feedback. The SPL FLCA F8X replaces these bushings with FK Rod Ends and High Misalignment Spherical Bearings, giving precise, locked geometry response. The main arm is slotted for the exclusive electroless nickel-plated 4130 Chromoly Double Adjuster with 360-degree rotating clamps that eliminate jam nuts. Stainless steel roll center spacers are included to correct roll center height on lowered vehicles, and the street version includes the headlight aiming rod bracket. Whether building a track-prepared M3 or correcting front-end geometry on a lowered M4 street car, the SPL FLCA F8X delivers the precision alignment control the platform demands.

Features and Benefits

• Roll center, camber, and track width adjustment for comprehensive front geometry tuning
• 6061-T6 billet aluminum construction with black anodized finish
• 4130 Chromoly gun-drilled Double Adjuster with electroless nickel plating and 360-degree rotating clamps eliminate jam nuts
• FK Rod Ends and High Misalignment Spherical Bearings eliminate bushing flex and binding under load
• Blue anodized titanium hardware reduces unsprung weight
• Stainless steel roll center spacers for lowered vehicles
• Street version includes headlight aiming rod bracket
• Sold as a pair, made in the USA

Fitment

Specifications

What Is Included

• 2 x SPL FLCA F8X Front Lower Control Arms (one per side)
• 4130 Chromoly Double Adjusters with 360-degree rotating clamps
• Blue anodized titanium socket-head cap screws
• Stainless steel roll center spacers (multiple sizes)
• Headlight aiming rod bracket (street version)
• Tapered stainless steel knuckle spacers
• Installation instructions

Frequently Asked Questions

What adjustments does the SPL FLCA F8X provide on the BMW M3 and M4?
The SPL FLCA F8X provides roll center correction, front camber adjustment, and front track width adjustment. These are the three key geometry parameters that change on lowered F80 M3 and F82/F83 M4 vehicles.

Is the SPL FLCA F8X suitable for daily street driving?
Yes. The Teflon-lined FK Rod Ends operate silently and require no special maintenance. The SPL FLCA F8X is a popular upgrade on daily-driven lowered M3 and M4 cars where proper front camber and roll center correction are needed to prevent premature outer tire wear.

Does the SPL FLCA F8X fit both the F80 M3 and F82/F83 M4?
Yes. The SPL FLCA F8X covers the F87 M2 (2016-2021), F80 M3 (2015-2018), and F82/F83 M4 (2015-2020) including CS and GTS variants.

Does installing the SPL FLCA F8X void my BMW warranty?
Under the Magnuson-Moss Warranty Act, BMW cannot void unrelated warranty coverage simply because an aftermarket part is installed. The dealer must prove the SPL FLCA F8X directly caused the specific failure being claimed.

Does the SPL FLCA F8X include the headlight leveling sensor bracket?
Yes. The street version of the SPL FLCA F8X includes the headlight aiming mechanism bracket. One of the two arms includes the bracket because the headlight leveling sensor is only on the driver-side arm on F8X BMWs.

What roll center spacer setup should I use?
For stock-height BMWs, install without roll center spacers above the bearing. For lowered cars, add spacers above the bearing to raise the roll center toward its OEM position. Do not exceed 1/2 inch of roll center correction above the bearing.

What are the torque specs for the SPL FLCA F8X?
Torque the subframe end bolt to 74 ft-lb (100 Nm). Torque the knuckle-side ball joint cap screw to 110 ft-lb with thread lubricant applied. Tighten the titanium clamp screws to 150 in-lb maximum. Inspect and re-torque after the first 100 miles and 500 miles.

Can the SPL FLCA F8X be used on track?
Yes. The SPL FLCA F8X is widely used in club racing, HPDE, and time-attack applications on the F8X platform. The locked rotating clamp design maintains alignment settings under repeated hard cornering loads. Inspect rod ends and fasteners after each track event.

Installation Overview

1. Raise and support the front of the vehicle; remove front wheels and undertray panels.
2. Disconnect the headlight leveling sensor from the driver-side OEM arm.
3. Remove the 21mm ball joint nut at the knuckle and the 21mm subframe bolt.
4. Use a pry bar to separate the ball joint; remove the OEM arm.
5. Pre-set the SPL FLCA F8X to match OEM arm length using the Double Adjuster.
6. Select roll center spacers based on ride height and install above the bearing only if lowered.
7. Install the SPL FLCA F8X at the subframe end first, then at the knuckle.
8. Apply thread lubricant to the cap screw; torque to 110 ft-lb.
9. Torque the subframe bolt to 74 ft-lb (100 Nm).
10. Tighten titanium clamp screws to 150 in-lb maximum.
11. Sweep suspension through full travel to confirm no binding or contact.
12. Reinstall wheels, lower the vehicle, and perform a professional four-wheel alignment.
13. Re-check all fastener torques after the first 100 miles and 500 miles.

California Prop 65 Warning: This product can expose you to chemicals including lead and chromium, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.