BC Racing ZX Series Coilovers – BMW M3 / M4 Competition xDrive (G80/G82, AWD) S58 – True Rear Coilover

OVERVIEW

The BC Racing ZX Series is BC's flagship motorsport coilover — a 3-way independently adjustable, external-reservoir platform built for serious track and time-attack use. This is the true-rear-coilover version for the AWD G80 M3 and G82 M4 Competition, converting the factory integrated rear damper to a true rear coilover for full rear ride-height and damping adjustment. It separates high-speed compression, low-speed compression, and rebound so the car can be dialed in for every phase of a corner.

SPECS

• 3-way independently adjustable damping — separate high-speed compression, low-speed compression, and rebound
• External-reservoir mono-tube design for consistent damping under sustained track load
• True-rear-coilover conversion — full rear ride-height and damping adjustment
• Full-length adjustable ride height — set height independent of spring preload to preserve shock travel
• High-tensile SAE 9254 springs; Swift spring upgrade available
• Front camber plates included where the application allows
• Fully rebuildable and serviceable; 1-year warranty

PARTS INCLUDED

• Set of 4 BC Racing ZX Series coilovers, assembled with springs
• True rear coilover conversion components
• External reservoirs with mounting brackets
• Front upper mounts / camber plates (application dependent)
• Spanner wrenches and damping-adjustment tools
• Installation hardware

TECH RESOURCES

• True-rear-coilover design — converts the factory integrated rear damper to a true rear coilover for full rear ride-height and damping adjustment
• This vehicle uses factory electronic/adaptive dampers — an adaptive damper (EDC) delete or bypass module is required to prevent a suspension warning light (not included)
• A professional wheel alignment is required after installation
• Professional installation and corner-balancing are recommended; installation follows the standard BC Racing coilover procedure

PART NUMBER

• I-135-ZX

VEHICLE APPLICATIONS