Holley Ignitions & Electrical

Wiring Harnesses, RetroBright Adapter, H4, Non-Standard Plug, Pin-Out Swap, Plug-and Play, Ceramic, Premium Version,Pair

Part Number: HLY-H820

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Weatherproof Connectors, Holley EFI, Wideband Connector, Main Harness Side, Metripack, 8-pin Male, Black Plastic, with Pins, Seals, TPA, Each

Part Number: HLY-570-200

Not Yet Reviewed

Estimated Ship Date: Today

Weatherproof Connectors, Holley EFI, Knock Sensor Connector, MPFI Universal Harness, Metripack, 3-pin Male, Black Plastic, with Pins, Seals, TPA, Each

Part Number: HLY-570-205

Not Yet Reviewed

Estimated Ship Date: Today

Ignition Coil Spacer, Plastic, Black, 0.575 in. Tall, Chevy, Small Block Gen V, Set of 16

Part Number: HLY-241-189

Not Yet Reviewed

Estimated Ship Date: Today

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: Today

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: Jan 15, 2026 if ordered today

• Drop Ship
• Special Order

Ignition Coil Spacers, Plastic, Beige, Chevrolet, Small Block LS, Set of 20

Part Number: HLY-241-199

Not Yet Reviewed

Estimated Ship Date: Jan 15, 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: Jan 15, 2026 if ordered today

• Drop Ship
• Special Order