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Description
Holley Coil-Near-Plug Smart Ignition Coils 556-128KIT, BIG WIRE 8 CYLINDER SMART COIL KIT Do you need precision control over your ignition system? Would your combination benefit from Individual Cylinder Timing Control? Are you experiencing spark issues with your Stock Coils? Are you wanting to convert your Turbocharged Big Block Monstrosity to Coil Near Plug?! Problem solved, introducing the Holley EFI Big Wire C N P Kit containing everything you need to upgrade your ignition system to handle 5. 5+
KIT, BIG WIRE 8 CYLINDER SMART COIL KIT
Do you need precision control over your ignition system? Would your combination benefit from Individual Cylinder Timing Control? Are you experiencing spark issues with your Stock Coils? Are you wanting to convert your Turbocharged Big Block Monstrosity to Coil-Near-Plug?! Problem solved, introducing the Holley EFI Big-Wire C-N-P Kit containing everything you need to upgrade your ignition system to handle 5.5+ HP per Cubic Inch
Features:
- “Big Wire” Sub Harness- Pre wired with 12ga Power and Grounds, for optimal performance!
- Peak Voltage – 44,000 Volts
- Peak Output – 102 Mj
- Maximum Battery Voltage 17.0 Volts
- Upgrading a Non C-N-P Main Harness requires the Holley Universal Coil-On-Plug Harness, P/N 558-307 to complete the installation!
- Contains two Terminated Sub-Harnesses, and Eight Holley Smart Coils, 3 ft. of wiring loom for a professional appearing installation!
- Sub Harness features Fully Terminated Coil Connectors, a 7 Pin Metripak Connector used on several Holley EFI C-N-P Main Harnesses, and 3 loose wires for a quick installation!
Application
-
Universal
Specs
| Brand | Holley EFI |
|---|---|
| Emission Code | 4 |
| Height | 1.86" |
| Ignition Wire Terminal Type | HEI Style Tower |
| Mounting Bolt Pattern | 74mm |
| Overall Length | 4.3" |
| Product Type | Distrutorless Ignition - DIS - smart coil |
| Width | 3.6" |
| Part Number | 556-128 |
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
4.6 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
GREAT LITTLE BOOK
Format: Board book
MY BUNNY LOVES THESE!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026
★★★★★ 4
cute
Format: Board book
its a cute and sturdy book. came a bit dented tho
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2021
★★★★★ 5
Cute!
Format: Board book
Perfect for little ones Easter basket!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
★★★★★ 5
Amazon Consumer
Format: Board book
I love this book. Has true facts in it. Giving it to grandchild for Easter. Great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
★★★★★ 1
Only One Page Featuring a Girl
Format: Paperback
I bought this intending to give it to a six-year-old girl who has started playing soccer. Instead, it's headed for the trash. There is only one page in the entire activity book that shows a female soccer player, and she looks like a little Barbie doll. Really?? The publishers need a serious thump on the head. Pretty sad for 2021.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2021