Holley Ignitions & Electrical

Wiring Harnesses, RetroBright, Adapter, H4, Non-Standard Plug, Pin-Out Swap, Plastic Version, Entry Level, Pair

Part Number: HLY-H821

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

• Drop Ship
• Special Order

Wire Connectors, RetroBright, Replacement, Unterminated Connector, Female, 3-pin, Plastic, Black, for H4 or 9003 System, Pins Not Included, Each

Part Number: HLY-RBEC121

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

• Drop Ship
• Special Order

Wire Connectors, RetroBright, Replacement, Unterminated Connector, Male, 3-pin, Plastic, Black, for H4 or 9003 System, Pins Not Included, Each

Part Number: HLY-RBEC120

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

• Drop Ship
• Special Order