$25 Off $250 / $50 Off $500, on Summit Racing Brand Products - Use Promo Code: BUILDIT

$25 Off $250 / $50 Off $500, on Summit Racing Brand Products - Use Promo Code: BUILDIT

It's the Season for Savings - Shop Holiday Deals Now!

Selected Filters


Loading...

Availability


Holley EFI ECU Connector Kits

5.0 out of 5 stars 4 Customer Reviews

You already have the wire and Holley EFI ECU connector kits have the rest of what you need to rewire your EFI installation. Fully terminate your own custom main harness with Holly EFI ECU connector kits. Features include: * Pre-terminated J1A/J1B Tyco Superseal connectors * 20 to 22 gauge pre-terminated wires * 16 to 18 gauge pre-terminated wires * Cavity plugs

Results 1 - 2 of 2

Weatherproof Connectors, Holley EFI, GM LSx Engine, Main Harness Connectors, Connectors, Pins, Seals, Cavity Plugs included, Kit

Part Number: HLY-570-103

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/24/2025

...Loading

Estimated Ship Date: Monday 11/24/2025

Weatherproof Connectors, Holley EFI, GM, MPFI/TPI, Main Harness Connectors, J1A/J1B Connectors, Pins, Seals, Cavity Plugs included, Kit

Part Number: HLY-570-102

Not Yet Reviewed

Estimated Ship Date: Dec 11, 2025 if ordered today

...Loading

Estimated Ship Date: Dec 11, 2025 if ordered today

  • 1
  • Page 1 of 1

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.