How do I adjust the low-speed and high-speed compression settings?

The low-speed and high-speed compression adjustments are made separately using the external reservoirs. Each adjustment position offers distinct feedback to help you fine-tune your suspension's response to different track conditions.

What is the benefit of the inverted strut design?

The inverted strut design places the larger piston rod at the bottom, which helps it handle the heavy side loads and braking forces that occur during aggressive driving and cornering on a race track.

Does this kit include everything needed for installation?

This kit includes the coilovers, external reservoirs, camber-adjustable front top mounts, and solid rear top mounts. Refer to the manufacturer's installation instructions for any additional hardware or tools that may be required.

AST BMW G80-G81 M3 / G82-G83 M4 / G87 M2 2021- RWD 5300 Series Coilovers

Specifications

Brand: AST
Part #: RAC-B2112SD
UPC: astRAC-B2112SD

AST BMW G80-G81 M3 / G82-G83 M4 / G87 M2 2021- RWD 5300 Series Coilovers

Name: AST BMW G80-G81 M3 / G82-G83 M4 / G87 M2 2021- RWD 5300 Series Coilovers
Brand: AST
Price: 9824.64 USD
Availability: InStock

$9824.64

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2021-2023 BMW M3 AST 5300 Series 3-way adjustable coilovers. Fine-tune rebound and high/low-speed compression for track performance.

Key Features

3-way adjustable damping — independently tune rebound, low-speed compression, and high-speed compression for precise control.
External reservoirs — increase oil capacity for consistent performance during demanding track sessions.
Monotube coilover design — built to withstand heavy side loads and braking forces.
Adjustable ride height — allows you to set your vehicle's stance and optimize weight distribution.
Camber-adjustable front top mounts — offers more wheel adjustment for improved front-end grip.
Solid rear top mounts — ensure a direct connection for responsive suspension feedback.

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Fits these vehicles

BMW M3 2021-2023
BMW M4 2021-2023

Product Details

Monotube coilovers with external reservoirs. These AST 5300 Series coilovers let you adjust rebound and both low- and high-speed compression separately. This allows you to fine-tune your suspension for track use, controlling body roll and improving tire contact. The AST RAC-B2112SD kit is designed for the 2021-2023 BMW M3, M4, and M2 RWD models.

The inverted strut design handles heavy side loads and braking forces common in racing. You can also adjust ride height and spring rates. This kit includes camber-adjustable front top mounts and solid rear top mounts, giving you more options to alter front-end geometry for better grip.