Rywire RY-13B-HALTECH-SUB-FD 13B Haltech Mil-Spec Harness for Mazda RX-7 FD3S

Vehicle Fitment

• Mazda RX-7 (FD3S), 13B Rotary Engine, Manual Transmission Only

Fitment Notes

• Manual transmission chassis only - the included chassis-specific adapter is not compatible with automatic FD3S applications
• Designed for use with a Haltech engine management system - harness comes pre-configured for the Haltech S3 by default; other Haltech ECU series may require a different configuration, so confirm your specific Haltech model before ordering
• Compatible with Bosch EV14 injectors, Denso 5th/6th generation injectors, Delphi pressure sensor, and Bosch knock sensor setups
• Special order item - non-refundable once ordered, though warrantied and guaranteed to work

Features

• Complete bundle includes both the 13B Haltech engine harness and the required Mazda RX-7 FD3S chassis-specific adapter - no need to source the adapter separately
• Built with Mil-Spec Teflon-coated wire rated to a maximum operating temperature of 200°C
• Standard-wall ethylene tetrafluoroethylene (ETFE) insulation, originally developed for aerospace applications, for superior heat and chemical resistance
• Loomed with Raychem DR-25 heat shrink covering for durability and abrasion resistance
• Adhesive-lined wire junctions help keep moisture out of critical connections
• Yellow identification tags simplify installation and future troubleshooting
• Upgraded connectors designed to withstand the extreme conditions of turbocharged and racing applications, where factory OE connectors are prone to failure
• Rywire provides installation phone support and troubleshooting assistance to back up the harness's reputation for reliability

Specifications

• Part Number: RY-13B-HALTECH-SUB-FD
• Brand: Rywire Motorsport Electronics
• Engine Application: Mazda 13B Rotary
• ECU Compatibility: Haltech (pre-configured for S3 by default)
• Injector Compatibility: Bosch EV14, Denso 5th/6th Injector
• Sensor Compatibility: Delphi Pressure Sensor, Bosch Knock Sensor
• Wire Insulation: Mil-Spec Teflon-Coated, ETFE, 200°C Max Rating
• Heat Shrink: Raychem DR-25

Included Components

• 1x Rywire 13B Haltech Mil-Spec Engine Harness (RY-13B-HALTECH)
• 1x Mazda RX-7 FD3S (Manual Only) Chassis-Specific Adapter (RY-13B-SUB-FD)

Product Description

The Rywire RY-13B-HALTECH-SUB-FD bundle gives manual-transmission Mazda RX-7 FD3S owners running a Haltech engine management system everything needed to wire the 13B rotary correctly, in one combined purchase: the engine harness itself plus the chassis-specific adapter that connects it to the FD3S's factory chassis wiring. Rather than sourcing the adapter separately and hoping it's compatible, this bundle is packaged specifically to work together.

Built to Rywire's Mil-Spec standard, the harness uses Teflon-coated wire rated to withstand up to 200°C, insulated with aerospace-grade ETFE material originally developed for demanding aerospace environments. Raychem DR-25 heat shrink and adhesive-lined wire junctions keep moisture and contamination out of critical connections, while yellow identification tags make installation and any future troubleshooting far more manageable than tracing unlabeled OE wiring.

This harness supports Bosch EV14 injectors, Denso 5th and 6th generation injectors, a Delphi pressure sensor, and a Bosch knock sensor, and comes pre-configured for the Haltech S3 ECU by default - buyers running a different Haltech series should confirm the correct configuration before ordering. As a special order item, it's non-refundable once purchased, though Rywire backs it with a warranty and direct phone support for installation and troubleshooting.