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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
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For Your Every Summer RSVP, with Code: SUMMER15
Description
HOLLEY EFI GEN III HEMI SMART COILS 556-163Black, 8 Pack Features: Direct bolt on to factory valve covers1 Same wiring pinout as other IGN 1A coils for easy plugin upgrades (Will not work with factory wiring)2 More spark energy than any other smart coil on the market for maximum fuel burn during combustion sequence3 Low current draw means less demand on the electrical and charging system4 Built in ignitor for compatibility with Holley EFI and many other aftermarket ECU? s5 Maximum operating
Black, 8-Pack
Features:
- Direct bolt-on to factory valve covers1
- Same wiring pinout as other IGN-1A coils for easy plugin upgrades (Will not work with factory wiring)2
- More spark energy than any other smart coil on the market for maximum fuel burn during combustion sequence3
- Low current draw means less demand on the electrical and charging system4
- Built-in ignitor for compatibility with Holley EFI and many other aftermarket ECU?s5
- Maximum operating voltage of 18 volts ? for compatibility with both 12 volt and 16 volt electrical systems found in many performance/race applications6
Specs:
| Brand | Holley EFI |
|---|---|
| Category Filter | Ignition |
| Clearance Category | Ignition |
| Coil Type | Holley SmartCoil |
| Color | Black |
| Emission Code | 3 |
| Grade Type | Performance |
| Product Type | Coil |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Great quality products
Used this product to make a new hot and ground on my 2001 Ford f450 with 2 batteries. Alot cheaper than factory!!
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Reviewed in the United States on August 17, 2025
★★★★★ 5
Purchase a very good set or at least the correct cutters for this wire. I’ll make your life hell .
Glad I bought it when I did. Copper has gone way up. And this is full core copper. Place my copper ends on the stuff works great. Using it on a solar battery bank.
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Reviewed in the United States on February 9, 2026
★★★★★ 4
Wire
It's good but it's aluminum
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Reviewed in the United States on November 22, 2024
★★★★★ 5
Works good
Great spare spool for RV application amd home build inverter setup
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Reviewed in the United States on March 5, 2026
★★★★★ 5
Good current wire
It works well
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Reviewed in the United States on October 20, 2025
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