Holley EFI 570-103 EFI Main Harness Connector Kit
Holley EFI 570-103 EFI Main Harness Connector Kit
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Holley EFI 570-103 EFI Main Harness Connector Kit

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Key item features

  • OEM Connectors: Includes OEM quality connectors, pins, seals, and TPAs for every engine sensor.
  • Custom Harnesses: Designed for building custom engine main harnesses, eliminating the need to sort individual components.
  • Flying Lead: Pairs with the flying lead harness (part number 558-126) for custom harness construction.
  • GM Compatibility: Specifically compatible with GM LSX Engines.
  • V8 Engine: Available for common domestic V8 engines, including LS, Coyote, 2V and 4V Modular, and GEN III HEMI engines.
  • Holley EFI: Part of Holley EFI's expanding Wiring Shop, providing comprehensive engine connector kits.
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Columbus, 43215
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Holley EFI 570-103 EFI Main Harness Connector Kit
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Comparison Chart:
Vehicle makeChevroletHolley EFI 570-103 EFI Main Harness Connector KitGMHolley EFI 558-220 GDI Sub Harness - Early LTx EngineGMHolley EFI 558-221 GDI Sub Harness - Late LTx Engine-Holley EFI 558-446 Pro Dash Service Harness-Holley EFI 554-137 Fuel Injection Pressure SensorHolleyHolley EFI 534-10 Engine Coolant Temperature SensorChevroletNTK Fuel Injection Pressure Sensor compatible with Chevrolet Traverse 3.6L V6 2009-2011
Vehicle modelLSXHolley EFI 570-103 EFI Main Harness Connector KitLTxHolley EFI 558-220 GDI Sub Harness - Early LTx EngineLTxHolley EFI 558-221 GDI Sub Harness - Late LTx Engine-Holley EFI 558-446 Pro Dash Service Harness554-137Holley EFI 554-137 Fuel Injection Pressure Sensor534-10Holley EFI 534-10 Engine Coolant Temperature SensorTraverseNTK Fuel Injection Pressure Sensor compatible with Chevrolet Traverse 3.6L V6 2009-2011
Automotive electrical part & accessory typeConnectorsHolley EFI 570-103 EFI Main Harness Connector KitWiresHolley EFI 558-220 GDI Sub Harness - Early LTx EngineWiresHolley EFI 558-221 GDI Sub Harness - Late LTx EngineWiresHolley EFI 558-446 Pro Dash Service HarnessConnectorsHolley EFI 554-137 Fuel Injection Pressure Sensor-Holley EFI 534-10 Engine Coolant Temperature Sensor-NTK Fuel Injection Pressure Sensor compatible with Chevrolet Traverse 3.6L V6 2009-2011
CompatibilityGM LSX EnginesHolley EFI 570-103 EFI Main Harness Connector KitEarly GM Gen V LTx EnginesHolley EFI 558-220 GDI Sub Harness - Early LTx EngineLate GM Gen V LTx EnginesHolley EFI 558-221 GDI Sub Harness - Late LTx Engine553-111 and 553-112Holley EFI 558-446 Pro Dash Service Harness-Holley EFI 554-137 Fuel Injection Pressure Sensor-Holley EFI 534-10 Engine Coolant Temperature Sensor-NTK Fuel Injection Pressure Sensor compatible with Chevrolet Traverse 3.6L V6 2009-2011
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