Pontiac ZB-05 Grand Prix 2004-2008 ER Coilover QX50 RWD Each car is different and

Each car is different and it may take some time to dial in your preferred settings

Swift Springs Standard (Hyperco u2013 Substitute)

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

Automatic System Calibration

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Pontiac ZB-05 Grand Prix 2004-2008 ER Coilover QX50 RWD Each car is different andThe 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