Dinan 21-27 BMW M3/M4 (G80/G82/G83) Adjustable Front & Rear Sway Bar Set - 28mm & 26mm

Every Dinan tuned anti-roll bar on the other hand is built and tuned specifically for each targeted BMW chassis to provide a more responsive and crisp experience. By reducing the amount of body roll your BMW is kept much closer to level than stock (while still allowing just enough body roll) to improve mechanical grip. This improvement gives the driver a much more planted and confident feeling in every corner making it a must-have upgrade for back road and track enthusiasts alike. Front: 28mm - Rear: 26mm - Adjustable - G80/G82/G83/G87 Dropping of the subframe is required so professional installation is highly recommended.

• Made of high tensile strength alloy steel with tubular (hollow) construction for maximum strength while limiting weight
• Rear bars are 2-hole adjustable allowing you to fine tune settings for environment or comfort preference
• Larger, more robust, bars; Front - 28mm size (vs. stock 23.5mm), Rear - 26mm size (vs. stock 21.9mm)
• Increased stiffness to combat roll; Front - 18% stiffer, Rear - 35-48% stiffer
• Includes polyurethane bushings and grease
• More stable at the limit
• More mechanical grip
• Less body roll

Upgrade your BMW’s handling with the Dinan D120-0640 adjustable front and rear sway bar set, engineered specifically for the G80, G82, G83, and G87 chassis. Designed for BMW M3 and M4 applications, this performance suspension upgrade reduces body roll while preserving enough suspension movement to maintain mechanical grip. The result is a more responsive, balanced, and confident driving experience on winding roads and at the track.
The Dinan front sway bar measures 28mm and the rear sway bar measures 26mm, providing increased stiffness over the original equipment bars. The front bar is 18% stiffer, while the rear bar delivers 35–48% greater stiffness depending on adjustment position. This added roll resistance helps keep the vehicle flatter through corners, improves stability near the limit, and gives the driver more precise control during aggressive driving.
Built from high-tensile-strength alloy steel, the bars use a tubular, hollow construction to maximize strength while limiting unnecessary weight. The rear bar features two adjustment holes, allowing fine-tuning for handling balance, driving conditions, and comfort preferences. The kit includes polyurethane bushings and grease for a complete installation. Subframe removal is required, so professional installation is highly recommended. The Dinan D120-0640 fits select 2021–2023 BMW M3 and M4 models, including G80 sedan, G82 coupe, and G83 convertible applications; verify vehicle compatibility before ordering.

Features:

• Application: Adjustable front and rear sway bar set for select BMW M3 and M4 models with G80, G82, G83, and G87 chassis

• Front Bar: 28mm tubular alloy steel sway bar with increased roll resistance

• Rear Bar: 26mm tubular alloy steel sway bar with two-position adjustability

• Stiffness: Front bar is 18% stiffer than stock; rear bar is 35–48% stiffer than stock

• Construction: High-tensile-strength alloy steel with hollow tubular design for strength and reduced weight

• Handling: Reduces body roll, improves cornering stability, and increases mechanical grip

• Included: Polyurethane bushings and grease

• Installation: Subframe removal is required; professional installation is highly recommended

Fitment:
BMW M2 Base 2023
BMW M2 Base 2024
BMW M2 Base 2025
BMW M2 Base 2026
BMW M3 Base 2021
BMW M3 Base 2022
BMW M3 Base 2023
BMW M3 Base 2024
BMW M3 Base 2025
BMW M3 Base 2026
BMW M3 Competition 2021
BMW M3 Competition 2022
BMW M3 Competition 2023
BMW M3 Competition 2024
BMW M3 Competition 2025
BMW M3 Competition 2026
BMW M4 Base 2021
BMW M4 Base 2022
BMW M4 Base 2023
BMW M4 Base 2024
BMW M4 Base 2025
BMW M4 Base 2026
BMW M4 Competition 2021
BMW M4 Competition 2022
BMW M4 Competition 2023
BMW M4 Competition 2024
BMW M4 Competition 2025
BMW M4 Competition 2026
BMW M4 Competition xDrive 2022
BMW M4 Competition xDrive 2023
BMW M4 Competition xDrive 2024