1992-2002 Mazda RX7 Link Ecu G4X
Link ECU G4X Mazda RX-7 FD Series 7–8 PlugIn ECU — RX7S7X
Upgrade your Mazda RX-7 FD with the Link ECU G4X RX7S7X PlugIn ECU. This advanced standalone engine-management system installs inside the factory ECU enclosure and connects to the original wiring loom, giving you complete control over fuel, ignition, boost and advanced motorsport functions.
Designed for compatible Series 7 and Series 8 FD3S RX-7 models with the 13B-REW rotary engine, the RX7S7X delivers modern engine management without requiring a complete standalone wiring harness.
FREE Link ECU USB Tuning Cable — $70 Value
Every RX7S7X purchased from Kugan Tuning includes a compatible Link ECU USB tuning cable at no additional cost. Connect your laptop directly to the ECU for configuration, diagnostics, data logging and professional tuning.
Important Twin-Turbo Limitation
The RX7S7X does not support sequential control of the factory twin-turbo system.
This ECU supports:
- Naturally aspirated configurations
- Factory or aftermarket twin turbos operating in parallel
- Single-turbo conversions
Vehicles retaining the factory twin turbos must be converted from sequential operation to parallel operation.
Why Choose the Link G4X RX7S7X?
- Designed for Mazda RX-7 FD Series 7 and Series 8 applications
- Supports compatible 13B-REW rotary engines
- Installs inside the factory OEM ECU enclosure
- Connects to the original engine wiring loom
- No complete standalone wiring harness required
- Advanced rotary fuel, ignition and boost control
- Supports staged injection
- Launch control, anti-lag and flat-shift capability
- Expandable inputs and outputs
- CAN communication
- 512 MB of onboard data-logging memory
- FREE Link ECU USB tuning cable included—a $70 value
- FREE Kugan Tuning remote setup support included—a $297 value
Suitable Applications
- Mazda RX-7 FD3S Series 7
- Mazda RX-7 FD3S Series 8
- Compatible 13B-REW rotary engines
- Manual-transmission vehicles only
Important Compatibility Information
- Compatible with manual-transmission vehicles only
- Compare your factory ECU connector and pinout with the product photos before ordering
- Compatibility depends on the factory ECU connector and pinout—not only the vehicle series or engine
- Sequential operation of the factory twin turbos is not supported
- Modified vehicles and engine swaps may require additional wiring, sensors and configuration
- I/O availability and expansion options should be verified in the installation manual
- Professional installation and rotary-engine calibration are strongly recommended
G4X Engine-Management Features
- Up to 6D fuel and ignition mapping
- Sequential and staged fuel-injection control
- Advanced leading and trailing ignition control
- Digital triggering with support for OEM trigger patterns
- OEM idle-control hardware support
- 5D boost control with three switchable tables
- Boost control based on gear, vehicle speed or throttle position
- Launch control
- Anti-lag
- Flat-shift control
- QuickTune automated fuel tuning
- Individual injector and ignition corrections
- Gear-based fuel, ignition and boost compensation
- Real-time selectable fuel, ignition and boost maps
- Continuous onboard barometric correction
- Knock control with configurable knock windows
- Hall-effect, variable-reluctance and optical trigger-sensor support
- CAN communication
- Onboard statistics recording
- 512 MB of onboard data-logging memory
I/O Expansion Options
The RX7S7X provides additional inputs and outputs for compatible sensors, switches and auxiliary devices.
Refer to the installation manual below for the complete expansion-connector pinout and configuration requirements.
What’s Included
- Link ECU G4X Mazda RX7S7X PlugIn ECU
- FREE Link ECU USB tuning cable—a $70 value
- FREE Kugan Tuning remote setup support—a $297 value
FREE Remote Setup Support — $297 Value
Purchase your Link ECU from Kugan Tuning and receive complimentary remote setup support to help prepare the ECU and vehicle for startup and professional tuning.
Remote setup support includes:
- Remote ECU connection and setup assistance
- Basemap selection guidance
- Initial ECU configuration assistance
- Startup configuration review
- Sensor and input verification
- Guidance preparing the vehicle for professional tuning
This support helps identify configuration and sensor problems early, reducing unnecessary troubleshooting and wasted dyno time.
Custom remote tuning and dyno tuning are not included unless separately purchased. Successful startup and vehicle operation depend on correct compatibility, installation, wiring, mechanical condition and ECU calibration.