ST XA Performance Coilovers – BMW M440i xDrive (G22/G23) B58

OVERVIEW

The ST XA coilover kit lowers the B58 M440i xDrive with height-adjustable ride height and externally adjustable rebound damping. Developed alongside KW Automotive, it lets you refine the driving dynamics to suit your preference — sportier and more track-stable, or softer and more comfortable — with a simple turn of the adjustment knob.

SPECS

• Height-adjustable ride height plus externally adjustable rebound damping
• Twin-tube damping principle with pressure-resistant damper housings, manufactured at KW
• 16 distinct clicks of adjustable rebound damping (compression fixed)
• Galvanized strut bodies, multi-sealed with additional coating for corrosion resistance
• Adjustable spring perch in friction-optimized polyamide composite with stainless steel insert
• Preset to ST's factory recommended damper settings, verified on KW shock dynos
• TÜV-approved; 5-year unlimited-mileage warranty

PARTS INCLUDED

• Set of 4 ST XA coilovers with springs
• Adjustment collars, spanner wrenches and hardware
• Damper setup manual

TECH RESOURCES

• Electronic damping (EDC/Adaptive M Suspension): confirm your car's damper configuration before ordering — ST catalogs separate part numbers for cars with and without electronic dampers, and EDC-equipped cars may require a deactivation kit (KW part no. 68511086), sold separately
• Ride height and rebound damping are adjustable — a professional wheel alignment is required after installation
• Professional installation and corner-balancing recommended

PART NUMBER

• 182200CZ

VEHICLE APPLICATIONS