AST 5100 Series 1-Way Coilovers – BMW M235i (F22, N55)

OVERVIEW

The AST 5100 Series is a monotube, single-adjustable (rebound) height-adjustable coilover for the BMW M235i (F22, N55). A street-and-track setup in a rebuildable AST platform.

SPECS

• Single-adjustable (rebound) monotube damping
• Height-adjustable, rebuildable coilover platform
• LCI-specific kit for 2015-and-later F22 cars with 5-bolt front strut towers — see Vehicle Applications
• RWD fitment

PARTS INCLUDED

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

TECH RESOURCES

Additional Parts Required

• 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.
• Cars with optional Adaptive M suspension: the factory adaptive damper connections must be electronically cancelled to prevent damper fault warnings.

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.
• Speed Logic offers professional installation — contact us to schedule an install.

Notes

• RWD only — the M235i xDrive uses a different AST kit.
• Count the bolts on each front strut tower before ordering. This kit is for 5-bolt towers; cars with 3-bolt towers need a different AST kit — confirm fitment with Speed Logic before ordering.

PART NUMBER

• ACU-B2101SD

VEHICLE APPLICATIONS