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These Harnesses are designed for retrofitting '14 - 18 LT4 Supercharged GEN V engines into older muscle cars and street rods or newer non-emissions controlled vehicles. They are completely plug and play with four wire hookup (switched power, constant power and ground connections required). Harnesses are designed with a sliding grommet seal and 4 - 5 feet of length from the rear of the cylinder head to the PCM mounting position under the vehicle dashboard. A sliding grommet seal allows for professional, leak proof installation.

Harnesses are professionally constructed from Brand New GM Factory/OEM Connectors and TXL (Polyethylene Cross Linked) High Temperature Wire to GM Specifications. All Harnesses are 100% Quality Inspected prior to shipping. All Harnesses require PCM VATs removal.

  • 2014 - 2021 Gen V LT4 Supercharged Standalone Harness 5.3/6.2/6.6
  • Complete engine and transmission wiring Harness
  • Choose from 10 speed auto, 8 speed auto, or manual options
  • Available with a 3 wire fuel pressure sensor or 4 wire fuel pressure sending unit
  • 2019+ Transmission are not supported
  • Connections For:
    • Fuse/Relay Box
    • Fuel Pump Control (Relay included)
    • Fan controls
    • OBD2 Port
    • Accelerator Pedal and Throttle Body control
    • MAF Sensor
    • MAP Sensor
    • Engine Coolant Temp Sensor
    • Alternator Control
    • (2) Upstream Oxygen Sensors
    • Crankshaft Position
    • Camshaft Position
    • Fuel Injectors
    • Coil Packs
    • Automatic or Manual Transmission control
    • Knock Sensors

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