Rotary13B1 MAZDA RX-7 Thermostat Neck/Elbow 1989-1991 S5 - POLISHED Aluminum S5 Thermostat Neck / Elbow Finishes Available: Polished, Bead Blasted, or Black E-Coated Application: 1989-1992 MAZDA RX-7, aka S5 Models