AST 5100 Series Coilovers

2013–2020 Subaru BRZ / 2017–2020 Toyota 86 / 2013–2016 Scion FR-S

ACU-S6401SD

Overview:

The AST 5100 Series Coilovers are engineered to deliver the perfect balance of comfort and performance for everyday driving. Designed specifically for the Subaru BRZ (2013–2020), Toyota 86 (2017–2020), and Scion FR-S (2013–2016), these coilovers provide enhanced grip and handling by allowing precise control over rebound damping and ride height.

Ideal for enthusiasts seeking improved road manners without sacrificing daily drivability, the 5100 STREET TCO Suspension system includes springs and is compatible with OEM top mounts. This setup enhances your vehicle’s responsiveness and stability, offering a more consistent and predictable driving experience.

Key Features:

These coilovers incorporate advanced technology and thoughtful design to improve your vehicle’s suspension performance:

• Monotube damper design with a large piston for superior rebound damping control and responsiveness.
• One-way adjustability for both rebound damping and ride height, allowing tailored suspension tuning.
• 12 distinct rebound adjustment positions to fine-tune the damper’s return speed for optimal road balance.
• Front and rear coilover design with included springs engineered to work with OEM top mounts.
• High-pressure dampers that adapt resistance based on driving conditions to enhance performance when needed.
• Rebuildable dampers serviceable at certified AST centers, ensuring long-term durability and maintenance.
• Extensive development and testing underpin the initial spring rates and damper settings for reliable baseline performance.
• Improved handling consistency and predictability compared to standard suspension setups.

Construction & Design

The AST 5100 Series Coilovers feature a monotube damper design, which eliminates aeration and foaming issues common in twin-tube shocks. This results in more precise and responsive valving, enhancing your vehicle’s control and feedback. The large piston design further refines rebound damping adjustability, allowing you to customize the suspension’s behavior to your driving style and road conditions.

Both front and rear dampers utilize coilover construction, integrating springs and shocks into a single assembly for compactness and improved performance. The springs included are matched to the dampers and designed to fit OEM top mounts, ensuring straightforward installation and compatibility.

Installation & Fitment

The AST 5100 Series Coilovers are designed as a direct replacement for the factory suspension components on the Subaru BRZ, Toyota 86, and Scion FR-S within the specified model years. They use OEM top mounts and mounting points, making installation straightforward without the need for cutting, drilling, or special tuning.

• Direct bolt-on fitment using factory mounting locations.
• Compatible with OEM top mounts for seamless integration.
• Adjustable ride height and rebound settings allow for personalized suspension setup after installation.

What’s Included

• Set of monotube coilovers for front and rear suspension
• Springs matched and designed to run with OEM top mounts
• Rebound adjustment knobs for fine-tuning damper return speed
• Hardware necessary for installation

Ideal For:

The AST 5100 Series Coilovers are perfect for drivers who want to enhance their vehicle’s handling and grip without compromising daily comfort. Whether you’re commuting, enjoying spirited weekend drives, or seeking a suspension upgrade that offers adjustability and long-term serviceability, these coilovers provide a balanced solution tailored to your needs.

AST Suspension develops high-performance damper and coilover systems built for drivers who want sharper handling on the street and consistency on track. With motorsport-oriented adjustability and engineered damping solutions (including offerings alongside MOTON), AST is a popular choice for enthusiasts who prioritize grip, balance, and control under hard driving.