GKTech FR-S / GR86 / BRZ Rear knuckles with all new kinematics
GKTech FR-S / GR86 / BRZ Rear knuckles with all new kinematics
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In-stock orders are processed within 48 hours; transit time is additional.
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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.
Wrong part/size or change of mind: a 20% return processing fee applies, plus applicable shipping costs.
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.
Missing, incorrect or transit-damaged items: report within 3 business days of receipt with photos of the product and packaging.
For defective items, contact us for help with the manufacturer's warranty process. The manufacturer decides the claim.
The 40mm drop knuckle is specifically designed to accommodate lowered cars, including 25mm of roll center correction; this ensures optimal suspension geometry and improved handling. An optimized camber curve ensures even tire wear along with optimized bump steer which when used with our relocated traction arm results in toe-in under both compression and extension, providing you with increased corner exit grip and more consistent handling.
Includes a provision for dual calipers to run a hydraulic e-brake and whether you have Brembo, GT, or GTS calipers, our knuckle is fully compatible. We understand the importance of retaining the OEM e-brake assembly and ABS system, which is why our knuckle is designed to seamlessly integrate with them without any compromises.
This reduces unsprung weight, improves handling, and increases overall performance. These knuckles utilise common sized high quality PTFE lined bearings which reduce OEM bushing elastokinematics and are easily replaceable and affordable (Part #COM10T)
Upgrade your vehicle's rear suspension with our rear suspension knuckle and unleash the full potential of your car. Engineered with precision, built for performance, and designed to exceed your expectations, this knuckle is the ultimate solution.
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40mm drop knuckle and 25mm roll centre correction - to correct geometry on lowered cars
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Optimised camber curve for more even tire wear
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Optimized bump steer for toe-in under compression without OEM arms' elastokinematics
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Dual caliper brackets for hydraulic e-brake (Compatible with Brembo, GT and GTS calipers)
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Sheet metal design constructed from high strength 4130 chromoly steel for ultimate strength
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Lightweight design optimized using finite element analyses - fully dressed weight 8.6lb vs standard knuckle 15.2lb
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Retains the ability to run the OEM e-brake assembly
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In built provision for OEM ABS sensor to retain ABS system compatibility
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High-quality PTFE lined spherical bearings throughout as standard (Part #COM10T)
INSTALLATION NOTES:
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Aftermarket high clearance rear upper control arm required strongly recommended (OEM upper control arm would require significant clearance modifications)
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OEM e-brake plate must be retained to ensure correct caliper to rotor offset
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OEM dust shield will require trimming for dual calipers
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Minimum 17" wheels required
