BC Racing ER Series Coilovers (True Rear) for 2003-2008 Nissan 350Z RWD (Z33)BC Racing ER Series Coilovers for the 2003 2008 Nissan 350Z (Z33) put race grade adjustability in reach of the serious track day driver, with independent compression and rebound tuning at every corner. Every kit is extensively tested on the Z33 chassis and refined until it balances ride quality with performance the reason 350Z coilovers from BC Racing are the best selling adjustable kits in their segment worldwide. ER Series kits run a linear twin