AST 5100 Comp Series Coilovers – BMW M3 / M4 (F80 / F82, S55)

OVERVIEW

The AST 5100 Comp Series is a competition-focused monotube, single-adjustable (rebound) height-adjustable coilover for the F80 M3 and F82 M4 (S55). It offers a track-oriented setup in a rebuildable AST platform.

SPECS

• Single-adjustable (rebound) monotube damping
• Competition-oriented Comp Series valving
• Height-adjustable, rebuildable coilover platform
• For cars with 5-bolt front strut towers (AST's "/5D" version)

PARTS INCLUDED

• Front and rear coilovers and springs
• Top mounts and hardware as supplied by AST

TECH RESOURCES

Additional Parts Required

• EDC cancellation module — required on cars with factory Adaptive M (EDC) dampers to prevent damper fault warnings: KW ESC Cancellation Module Pair — choose 68510390 (F80 / F82 / F83). Not needed on cars without Adaptive M.
• Four-wheel alignment — mandatory. Camber, caster and toe change with ride height; book a full alignment (and corner-balance for track use) immediately after installation.

Installation

• AST Install & Setup guide (ast-suspension.com) — the manufacturer's installation and setup procedure: kit verification, spring preload, clearance checks and handling warnings.
• AST Torque Specifications (ast-suspension.com) — manufacturer torque values plus thread preparation and threadlocker guidance.
• Request an Install Appointment

Notes

• Count the bolts on each front strut tower before ordering. This version is for 5-bolt strut towers; early-production cars with 3-bolt towers need AST's "/3D" version — confirm fitment with Speed Logic before ordering.

PART NUMBER

• ACC-B2103S/5D

VEHICLE APPLICATIONS