AST Suspension Adjustable Lowering Springs – BMW M2 / M3 / M4 (G87/G80/G82)

OVERVIEW

The AST Adjustable Lowering Springs lower your car's center of gravity while preserving the comfort you are used to from the original equipment springs. Unlike a conventional lowering spring you are not locked into a fixed drop: the AST height adjuster lets you fine-tune ride height even after the kit has been installed.

They are a direct replacement for the OEM springs and are developed specifically for each vehicle. The springs are cold coiled from premium materials on Wafios coiling machines, and the progressive design strikes a balance between lowering the car and improving how it performs. Made in the Netherlands.

SPECS

• Height-adjustable lowering spring kit — ride height can be fine-tuned after installation using the AST height adjuster
• Progressive spring design, balancing lowering against performance
• Direct replacement for the OEM springs, developed vehicle-specific
• Developed and tested to work with the factory dampers
• Cold coiled on Wafios coiling machines from premium spring material
• Manufactured in the Netherlands
• AST's lowering spring program covers drops from 20 mm to 60 mm depending on the application

PARTS INCLUDED

• Front and rear AST adjustable lowering springs with AST height adjusters
• Complete kit as supplied by AST Suspension; see the installation instructions for the full bill of materials

TECH RESOURCES

Additional Parts Required

• Four-wheel alignment — mandatory. Lowering the car changes camber and toe. Book the alignment for immediately after installation.
• Professional installation. The struts have to come apart to change springs; this is work for a qualified suspension shop.
• Coil spring compressor. Required to disassemble the factory strut assemblies safely — installer-supplied.
• No damper change required. AST develops and tests these springs to work with the factory dampers, including the adaptive M dampers fitted to these cars.
• Optional: replace worn strut mounts, bump stops and dust boots while the struts are apart.

Installation

• AST Install & Setup guide (ast-suspension.com) — the manufacturer's general installation and setup notes, including kit verification, clearance checks and handling warnings.
• AST Torque Specifications (ast-suspension.com) — manufacturer torque values and thread preparation guidance.
• AST does not publish a vehicle-specific printed installation manual for this spring kit; installation follows the factory BMW spring replacement procedure. Contact Speed Logic if you need help sourcing the procedure.

PART NUMBER

• ASTALS-21-004

VEHICLE APPLICATIONS