Pontiac ZB-05 Grand Prix 2004-2008 ER Coilover QX50 RWD Automatic System Calibration

Automatic System Calibration

Flow Digressive Piston Technology

Mono-Tube Shock Design

The BC Racing BR Series offers the most affordable entry into coilover suspension without sacrificing performance

A conventional shock absorber can withstand a 2kg spring rate difference before requiring a revalve

Pontiac ZB-05 Grand Prix 2004-2008 ER Coilover QX50 RWD Automatic System CalibrationThe BC Racing ER Series Coilover System is the next evolution in your suspension tuning and vehicle setup needs. The ER Series offers 30 clicks of independently adjustable compression and rebound with remote reservoirs to increase oil capacity and help with faster heat dissipation. Each ER Series Coilover System undergoes the same rigorous testing and development as the coilover series that precede it, with the addition of more extensive real world