$595.00 USD
$595.00 USD














The JDY Performance G8X Chassis Brace is engineered to address common clearance and noise issues caused by aftermarket exhaust systems, while simultaneously improving overall chassis rigidity and driving stability.
6061-T6 Aerospace-Grade Aluminum
Manufactured from high-strength 6061-T6 aluminum alloy, CNC-machined from a solid billet to achieve an optimal balance between rigidity and weight. The surface is anodized for increased hardness, scratch resistance, and corrosion protection.
Enhanced Exhaust Clearance (+20 mm Depth)
Compared to the OEM brace, the longitudinal profile is deepened by 20 mm, effectively eliminating exhaust contact and vibration issues commonly introduced by modified exhaust systems—without reducing ground clearance.
✔ The lowest point of the brace remains higher than the vehicle’s lowest chassis point, ensuring full drivability.
Lightweight Cut-Out Design
Symmetrical cut-outs remove non-load-bearing material while preserving critical stress paths. This results in maximum weight reduction without sacrificing structural integrity.
Direct Bolt-On Installation
Fully compatible with factory mounting points and OEM bolt specifications.
Improved Chassis Rigidity & Handling Response
The increased structural stiffness contributes to improved lateral stability and sharper handling feedback, especially noticeable during aggressive driving, track use, or high-speed cornering.
Compatible with LHD & RHD models:
BMW M3 G80 (Sedan) – 2019–2024
BMW M3 G81 (Touring) – 2021–2024
BMW M4 G82 (Coupe) – 2020–2024
BMW M4 G83 (Convertible) – 2020–2024
BMW G87 M2 (Coupe) – 2023–2024
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$595.00 USD
$595.00 USD
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.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
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.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
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.
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.