BC Racing HM Series Coilovers for 1987-1992 Mazda RX-7 RWD (FC3S)BC Racing HM Series Coilovers for the 1987 1992 Mazda RX 7 (FC3S) combine the inverted damper durability of the RM Series with the independent compression and rebound tuning of the ER Series BC's pick for track day McPherson strut builds. Every kit is extensively tested on the RX 7 FC3S chassis and refined until it balances ride quality with performance the reason RX 7 coilovers from BC Racing are the best selling adjustable kits in their segment