Link G4X RX7Link RX7S6X ECU

The Link G4X RX7Link RX7S6X ECU is a direct-fit engine management system designed for Mazda RX7 Series 6 models using the 13B turbo engine. It installs into the factory ECU location and connects directly to the OEM wiring loom on supported vehicles.

This ECU is intended for manual transmission vehicles only and supports most factory systems while providing advanced tuning capability through the G4X platform.

Important: Manual transmission only. Designed for RX7 Series 6 13B turbo engines. Please confirm your ECU pinout connector matches the header shown in the product images before purchase. E-throttle requires modification before use.

Engine Control Capability

• Designed for 13B turbo rotary engines
• Supports naturally aspirated, parallel twin turbo, or single turbo configurations
• Does not support sequential control of factory twin turbos
• Sequential fuel injection
• Digital triggering using OEM patterns
• Staged injection support
• Knock control with windowing

Hardware and Platform

• Direct plug-in installation using factory ECU enclosure
• Continuous onboard barometric correction
• USB tuning connection
• 512 MB onboard data logging

Vehicle Compatibility

• Mazda RX7 FD3S Series 6
• 13B turbo engine
• Manual transmission only

G4X Plug-In Key Features

• Up to 6D fuel and ignition mapping
• Sequential fuel delivery
• OEM idle control supported
• 5D boost control with three switchable tables
• Launch control, anti lag, and flat shift
• Individual cylinder fuel and ignition correction
• Gear-based fuel, ignition, and boost compensation
• QuickTune automated fuel tuning
• Selectable dual fuel, ignition, and boost maps
• CAN communication support

I/O Expansion

The following expansion connector inputs and outputs are provided:

• Sensor Ground – Ground
• +5V Out – MAP sensor supply
• Analogue Voltage 5 (0–5V)
• Analogue Voltage 6 (0–5V)
• DI6 – Digital input

Downloads and Resources

• Installation Manual (PDF)

View all Link ECU Resources