Gen3 LS Bundle - G4X StormX ECU + LS Engine Harness + Fuse Box bundle

A ready-to-go solution to connect a Link ECU to your Gen 3 (LS1 & LS6), Cable Throttle LS V8 engine, including a fuse box and relay.

Bundle Includes:

• G4X StormX ECU (8 x Injector and 8 x Ignition Drives) - 108-4000
• Terminated Engine Harness GM LS GEN3/4* - 101-0300
• LS Stepper Adapter Harness - 101-0301
• LS MAP Adapter Harness - 101-0302
• LS Gen 3 Knock Adapter Loom - 101-0305
• LS Fuse and Relay Box - 101-0310

Gen 4 LS engines are better to consider this bundle: 109-9020B

PCLink MAP Files
Gen3 Cable Throttle Base Map for G4X XtremeX/StormX

Harness Manual

Online Instruction Manual

Advanced features on the StormX ECU:

• Built in trigger oscilloscope.
• Onboard Knock Control – support for two knock sensors wired directly to the ECU. No external amplifier required.
• Boost control can be open or closed loop with up to three switchable tables.
• Idle valve solenoid or stepper motor control.
• Rotary oil metering pump control.
• Most Motorsport features including full gear shift control, antilag and launch control
• Up to 4 fully variable closed loop VVT cams.

The terminated harness has the following features:

• Designed to match the PC Link base maps IO setup so that most engines can be made to run with minimal adjustments.

• Provides spare IO via a “Spares” connector — extra capacity for sensors, switches, or custom additions.

• With the addition of the fusebox, this bundle includes main chassis “flying leads” (un‐terminated wires) for essential power and control, including:

  • Large red “Batt+” wire (for ECU main power)

  • Red-Green “Fan” wire (ECU-controlled +12V to cooling fan), rated 20A continuous

  • Red-Blue “Fuel Pump” wire (ECU-controlled +12V), 20A continuous

  • Grey-Black “Ign Sw” wire (to ignition switch)

• Equipped with sealed JPT terminals in the chassis connector (TE Connectivity JPT family), with mating connector specs provided.

• The harness includes multiple dedicated connectors for key components, such as:

  • Pedal connector (for DBW pedal): 5V, sensor ground, two analog voltage inputs

  • CAN2 connector: for CAN devices like lambda modules, displays, keypads, etc.

  • MAP connector: compatible with Link MAP sensors; adapter available for factory LS MAP sensors

  • Knock sensor connector: supports up to two knock sensors, with adapters available for Gen 3 or Gen 4 factory sensors

  • Alternator connector: for “F Body” alternators; provides exciter/lamp wire to terminal B

  • Transmission (“Trans”) connector: for reverse switch, DI, or other functions needing cabin signal

  • IAC connector: for 4-wire stepper IAC; if no IAC is used, those channels may be used for other functions (boost valve, NOS, etc.)

  • TPS connector: for cable-throttle sensors; if using DBW, may be repurposed

  • DBW (electronic throttle) connector: for DBW throttle bodies, providing analog inputs, 5V, sensor ground; may be repurposed in cable-throttle engines