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The Rywire Mil‑Spec engine harness for Mazda RX‑7 FD3S with the 13B engine includes Denso primary and secondary plugs and is purpose-built for that chassis. Specified for the FD3S, this harness provides a direct, high-quality wiring solution for builders and tuners fitting Haltech/AEM-style ECU systems that require factory-style Denso terminations on a rotary platform.
Rywire Mazda RX7 FD3S 13B Mil-Spec Engine Harness w/Denso Primary & Secondary Plugs
