GKTech F8X M2/M3/M4 Rear suspension Kinematics Kit
GKTech F8X M2/M3/M4 Rear suspension Kinematics Kit
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Need help with a return? Request authorization within 30 days of delivery for eligible unused, uninstalled items. See details for exclusions and applicable fees.
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Request return authorization (RMA) within 30 days of delivery for eligible items. Keep items unused and uninstalled, with original packaging and accessories. Electronics, liquids, special orders and other categories are excluded.
Email sales@frsport.com with RETURN and your order number in the subject to request an RMA. Please wait for return authorization before sending your item back.
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Original shipping is non-refundable. For orders shipped free, the actual outbound shipping cost is deducted from the refund. Return shipping is prepaid by the customer.
After payment capture, cancellations and refunds generally incur a 5% processing fee, except for our error, confirmed defects or confirmed carrier loss. The 5% and 20% fees do not stack; only the greater applicable fee applies. Store credit waives the 5% fee, but applicable return fees remain.
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For defective items, contact us for help with the manufacturer's warranty process. The manufacturer decides the claim.
The GKTech F8X M2/M3/M4 Kinematics kit is a unique rear suspension geometry solution for BMW M2, M3, and M4 models.
Lowering your vehicle negatively effects roll center, bump steer and the toe curve. That is where the GK Kinematics Kit is beneficial, improving the roll center and camber geometry to more track focused values for a lowered vehicle.
This change does slightly flatten the rear toe curve, making it less aggressive. However, by pairing the Kinematics Kit and our bump steer adjustable toe arms, you can lower the toe arm position using the supplied spacers to correct the toe curve or even a more aggressive one, ensuring more predictable handling and drivability.
This can be seen in the comparison graphs in the product photos!
Kinematics Kit
This kit has been engineered through 3D scanning/ modeling and repositions the toe arm pickup points to restore optimal geometry while maintaining OEM-like handling feel.
Features:
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Increased negative camber for more aggressive alignment options
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Reduced roll moment arm for minimized body roll
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Adjustable bump steer and roll center correction through eccentric design
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Spherical bearings reduce bush deflection and provide smooth suspension travel
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CNC Machined 6061-T6 aluminum body
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COM10T PTFE-lined self-lubricating spherical bearings for longevity
Adjustable Toe Arms
The bump steer adjustable toe arms allow adjustment of rear toe and bump steer to adjust the vehicles rear toe, as well as complement the geometry changes introduced by the Kinematics Kit.
Features:
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High-quality 5/8" Teflon-lined pillow ball rod ends for direct steering feedback
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28mm OD, 3mm wall 4130 chromoly construction with CNC-machined ends
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TIG welded and e-coated for a durable finish
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Adjustable bump steer correction up to 4mm using included shims
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CAD-designed and FEA-tested
Vehicle Compatibility
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BMW F80 M3 / M3 Competition
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BMW F82 / F83 M4 / M4 Competition
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BMW F87 M2 / M2 Competition
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BMW G80 M3 / M3 Competition
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BMW G82 M4 / M4 Competition
Both the kinematics kit and suspension arms are sold as a pair.
Note: The Kinematics Kit must be used with GKTech Adjustable Toe Arms (included in this package).
