HKS designed a perfect spark plug for all types of engine.

HKS: Spark Plug Iridium (Mazda rotary)

Brand: HKS
Part Number: 50003-M50RE

Stock images used. Actual product may vary.
Mazda Cosmo JC3S 13B-REW (03/1994-09/1995) Mazda Cosmo JC3SE 13B-REW (02/1990-02/1994) Mazda Cosmo JCES 20B-REW (03/1994-09/1995) Mazda Cosmo JCESE 20B-REW (02/1990-02/1994) Mazda RX-7 FC3C 13B-T (03/1989-10/1992) Mazda RX-7 FC3C 13B-T (10/1985-02/1989) Mazda RX-7 FC3S 13B-T (03/1989-11/1991) Mazda RX-7 FC3S 13B-T (10/1985-02/1989) Mazda RX-7 FD3S Type I 13B-REW (12/1991-09/1994) Mazda RX-7 FD3S Type II 13B-REW (09/1994-03/1995) Mazda RX-7 FD3S Type III 13B-REW (09/1994-01/1996) Mazda RX-7 FD3S Type IV 13B-REW (01/1996-12/1998) Mazda RX-7 FD3S Type V 13B-REW (01/1999-09/2000) Mazda RX-7 FD3S Type VI 13B-REW (10/2000-08/2002) Mazda RX-7 SA22C 12A (03/1983-09/1985) Mazda RX-8 SE3P 13B-MSP (02/2003-03/2008) Mazda RX-8 SE3P 13B-MSP (03/2008-04/2013)