HOLLEY
J2B Auxiliary Harness Kit
SKU: HLY558-402
$207.99
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EFI Wiring Harness - J2B Auxiliary Connector Harness - Holley Dominator EFI - Universal - Kit
What this part is for
HOLLEY J2B Auxiliary Harness Kit is used to rewire or update a vehicle’s electrical system — clean power distribution, switches, and factory-style circuits for restorations and street builds. EFI Wiring Harness - J2B Auxiliary Connector Harness - Holley Dominator EFI - Universal - Kit Ask Grok with your year, make, model, and engine, or Call Us — confirm fitment once before you buy. Real people at Cunningham Customs handle the order.
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Comments & builder notes
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