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

OVERVIEW

The BC Racing ER Series is a 2-way coilover with independently adjustable compression and rebound and an external reservoir, built for serious track and motorsport use. For the AWD G80 M3 and G82 M4 Competition xDrive it offers the widest tuning range in BC's core lineup, letting you separate low-speed and high-speed damping control.

SPECS

• 2-way independently adjustable damping — separate compression and rebound control
• External reservoir mono-tube design for consistent motorsport performance
• Full-length adjustable ride height
• 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 ER Series coilovers, assembled with springs
• 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-ER

VEHICLE APPLICATIONS