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558-101 Holley EFI TPI/Stealth Ram Main Harness
$491.95GM Tuned Port / Holley Steathram Engine Harness -
558-309 Holley EFI Holley DIS Coil to Holley LSx Harness Adapter
$112.95This kit contains plug-and-play harnesses to connect Holley 24x or 58x main harness to Holley waste-fire DIS coils. Not compatible with 556-112 coil near plug smart coils (see 558-312 for 556-112 smart coil applications ) -
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558-409 Holley EFI Sealed USB Data Cable
$71.707' long sealed USB data cable. This cable is included with the purchase of an HP or Dominator ECU. -
558-433 Holley EFI Digital Dash I/O Adapter w/Unterminated Vehicle Harness
$266.95I/O Adapter w/Unterminated Vehicle Harness -
558-103 Holley EFI LS2/3/7+ (58x/4x) Engine Main Harness
$563.95This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly found in 2006+ Year Model vehicles with LS variants such as the: LS2,LS3,LS7,L76,L92, and L98. -
570-201 Holley EFI Injector Connector – Main Harness Side
$8.30Introducing the Holley EFI Wiring Shop. We have one goal, to provide you a one stop solution for all of your wiring components needs. From connectors and pins to wire loom and tools! We have everything you need to build or service your Holley EFI powered... -
570-202 Holley EFI Injector Sub Harness Connector
$8.15Introducing the Holley EFI Wiring Shop. We have one goal, to provide you a one stop solution for all of your wiring components needs. From connectors and pins to wire loom and tools! We have everything you need to build or service your Holley EFI powered... -
570-206 Holley EFI Throttle Position Sensor (TPS) & Pressure Transducer Connector
$7.12Introducing the Holley EFI Wiring Shop. We have one goal, to provide you a one stop solution for all of your wiring components needs. From connectors and pins to wire loom and tools! We have everything you need to build or service your Holley EFI powered... -
570-101 Holley EFI 2V/4V MOD Main Harness Connector Kit
$97.97Introducing EFI Engine Connector Kits – From Holley EFI. With the latest addition to our ever-expanding Wiring Shop, our goal was to provide you with every engine connector used on the Holley EFI main harnesses. If you are building a custom engine... -
570-103 Holley EFI LSX Main Harness Connector Kit
$122.95Introducing EFI Engine Connector Kits – From Holley EFI. With the latest addition to our ever-expanding Wiring Shop, our goal was to provide you with every engine connector used on the Holley EFI main harnesses. If you are building a custom engine...
