Rywire Mil-Spec Tucked 13B Engine Harness - Mazda RX-7 FD3S Single Turbo (13B-Milspec)

Rywire 13B-Milspec is a factory-replacement style, wire-tuck mil-spec engine harness for the 13B in a Mazda RX-7 FD3S. It follows the factory FD layout but drops the twin-turbo sensors you no longer need, and is built in Tefzel wire with DR-25. For single-turbo setups only. Built to order by Rywire in the USA.

Engine Swap Fitment

• Chassis: Mazda RX-7 FD3S (built for this chassis, not as a standalone 13B harness)
• Engine: 13B, single turbo only
• Left-hand drive; right-hand drive available (earlier-model computer type)
• Manual or automatic chassis (automatic requires a connector core, see FAQ)

Features

• Tefzel wire with DR-25, tucked layout
• Factory FD3S layout with the twin-turbo sensors removed
• Plugs into 2 computer plugs and 2 chassis plugs
• Choice of injector plug for primary and secondary injectors

Connector List

• Coolant temperature (computer)
• Coolant sender (gauge)
• Knock sensor
• Injectors 1-4 (2 leading, 2 trailing)
• Computer ground
• Oxygen sensor (single-wire narrowband)
• Throttle position sensor (TPS)
• Intake air temperature (IAT)
• 4 transmission connections
• Fan switch
• Cam and crank sensors (Trigger 1 and Trigger 2)
• Oil metering pump
• Boost solenoid
• Idle motor (IAC)
• 2 computer plugs and 2 chassis plugs

Choosing Options

• Drive Side: left-hand or right-hand drive. Right-hand drive harnesses use the earlier-model computer type.
• Injector Plug: the plug on the primary injectors - RDX, Nippon Denso / ID2000, NH1 / Honda OBD2, Delphi, Bosch EV6, Bosch EV1 / Honda OBD1, or Bosch EV14 / Injector Dynamics.
• Transmission: manual or automatic. Automatic chassis use different engine harness connections.
• The secondary injectors are built with the same plug you pick for the primary injectors.

Recommended Add-Ons

• Rywire Engine Ground Kit - 4-Gauge Battery Cable & 8-Gauge Grounds for Swap Harnesses.

Add any of these from the Recommended Add-Ons list above. Each one is its own listing.

What's Included

• Mil-spec tucked 13B engine harness built to your selections

Frequently Asked Questions

I have an automatic FD. What do I need to send?

Send in the large blue connector near the computer plugs from your original engine harness. Rywire installs it on your new harness.

Does it support right-hand-drive cars?

Yes. Right-hand-drive harnesses use the earlier-model computer type. The 1996-1998 Australian 16-bit computers are not supported.

Can I run it on a twin-turbo setup?

No. The twin-turbo sensors are removed; the harness is for single-turbo applications only.

Not sure which options to pick?

Email service@tunedbyshawn.com with your engine, chassis and ECU before ordering if you are unsure which configuration you need.

For off-road and competition use only. Not legal for use on pollution-controlled motor vehicles.