EFI

Holley EFI LS main harnesses have a MAP sensor connecter designed for use with a LS1/2 style MAP sensor. The 558?????416 is an Adapter harness that allows for Holley LS2 Harness PN 558?????103 to be used on LS3 engines, which has a different MAP sensor.

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Crank/Cam Ign. Harness. Fully terminated harness. Connects to Holley 60???2 crank sensor and GM Cam???Sync Distributor AC Delco PN213???350 or eficonnection.com sync pulse distributor

Sealed USB Data Cable (Comes with ECU's)

j2A, j2B, j3, j4 Connector & Pin Kit ????? Contains connectors & pins, but no wiring. for Dominator EFI

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GM 4L60/80E Transmission Harness ????? Complete terminated harness with j4 connector to operate GM electronic transmissions. for Dominator EFI

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Connector J1A/B Inputs/Outputs Auxiliary Harness for HP EFI & Dominator EFI

This kit contains plug and play harnesses to connect Holley 24x or 58x main harness to Holley wastefire DIS coils.

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