BMW F8X adjustable Rear Upper Arms (RUA) are an absolute necessity to maintain proper rear camber and reduce tire wear on the street and track. The stock BMW setup has an aggressive camber curve through bump travel, which is very apparent on lowered cars. Excess negative camber causes premature tire wear on the inside edge, and reduced traction on acceleration while too little camber will limit rear grip while cornering. Our Rear Upper Arms provide a wide adjustment range for precise rear camber alignment that is easily optimized for street or track driving while eliminating bushing deflection with smooth articulating Teflon lined rod ends in place of the soft factory rubber bushings. Our kit replaces the factory links commonly referred to as the rear wishbone and rear guide links. BMW F8X Rear Upper Arms are gun drilled 2024 Aluminum links to reduce weight, then are Black Anodized to prevent corrosion and provide a durable finish. Our 360 degree 6061-T6 Aluminum Rotating Clamp design allows for quick, precise adjustment. Our Clamps tightened down with Blue Anodized Titanium Socket Head Cap Screws gives easy access to adjust camber settings, shaving off even more unsprung weight without compromising strength. Our Rear Upper Links provide superior performance, durability, and ease of adjustment. Long gone are the days of fumbling with wrenches to tighten jam nuts while trying to trying to keep your bearings oriented correctly. FK Spherical Bearings and Rod Ends are manufactured in Connecticut and utilize a Teflon liner to provide quiet operation, lower friction, smooth articulation, and eliminates bushing deflection under load. Sold as a complete kit for one car (4 total arms). Made in the USA.
This Part Fits:
Year
Make
Model
Submodel
2016-2018
BMW
M2
Base
2019-2021
BMW
M2
Competition
2020
BMW
M2
CS
2015-2018
BMW
M3
Base
2015-2020
BMW
M4
Base
2019-2020
BMW
M4
CS
2016
BMW
M4
GTS
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TERMS (REQUIRED)
OFF-ROAD USE POLICY & EMISSIONS COMPLIANCE NOTICE
California Proposition 65 Warning:
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of
California to cause cancer or birth defects or other reproductive harm. For more information, visit
www.P65Warnings.ca.gov.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell,
install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public
roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB),
it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Civil penalties up to $4,819 per violation per vehicle
Possible criminal penalties under the Clean Air Act
Revocation of registration or smog certification by DMV or local authorities
State & Local Regulations:
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local
regulations before purchasing or installing emissions-related products.
Intended Use & Customer Certification:
All performance, racing, or competition parts sold by this company are intended solely for off-road,
closed-course, or competition use on vehicles that are never registered or used on public highways.
Company Policy Statement
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the
use of emission-control defeat devices or any modification that violates the Clean Air Act or state
regulations.