BC Racing ZX Series Coilovers – BMW 340i (F30, RWD, 5-Bolt Top Mount) B58

OVERVIEW

The BC Racing ZX Series is BC's flagship 3-way independently adjustable coilover, built for serious track and motorsport use. For the RWD F30 340i it combines separate high-speed compression, low-speed compression, and rebound adjustment with an external-reservoir mono-tube damper and full-length adjustable ride height, giving you race-level control over the car's balance while preserving shock travel.

SPECS

• 3-way independently adjustable damping — separate high-speed compression, low-speed compression, and rebound
• External-reservoir mono-tube damper design for consistent performance under sustained track load
• 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
• External reservoirs with mounting brackets
• Front upper mounts / camber plates (application dependent)
• Spanner wrenches and damping-adjustment tools
• Installation hardware

TECH RESOURCES

• Fits cars using the 5-bolt front top mount
• If your car is equipped with the optional adaptive M / EDC suspension, an adaptive damper (EDC) delete or bypass 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-80-ZX

VEHICLE APPLICATIONS