556-128 HOLLEY Performance Coil Plug Smart

Review HOLLEY Performance Coil-near-plug Smart Coil

The Holley 556-128 Performance Coil-Near-Plug, also known as a Smart Coil, is a high-performance ignition component designed for automotive applications. This coil is part of Holley's line of top-tier ignition systems, engineered to deliver reliable, consistent spark for improved combustion and increased power output.

The Holley 556-128 Smart Coil is a compact, self-contained ignition system that integrates the functions of an ignition coil and distributor into a single, easy-to-install package. Its design places the coil near the spark plug, reducing the length of the primary ignition wire and minimizing voltage drop, resulting in a stronger, more efficient spark. This is particularly beneficial for high-performance engines that demand precise and reliable ignition.

This coil features a unique, patented design that uses a digital control module to monitor engine RPM and advance the spark timing accordingly. This advanced technology ensures optimal ignition timing for all engine speeds, improving combustion efficiency and power output. The module also includes a built-in rev limiter, allowing the user to set a maximum engine RPM.

The Holley 556-128 Performance Coil-Near-Plug is designed to be compatible with most popular ignition systems, including points, distributorless, and electronic fuel injection systems. It is constructed from high-quality materials, including a robust ceramic core in the ignition coil and a durable, corrosion-resistant housing. The coil also features gold-plated terminals for superior conductivity and long-lasting performance.

Installation of the Holley 556-128 Smart Coil is straightforward, with clear instructions provided in the included user manual. The coil can be installed using standard hand tools, and no additional modifications are typically required. Additionally, the coil's compact size and modular design make it easy to integrate into a wide range of applications.

In summary, the Holley 556-128 Performance Coil-Near-Plug is a high-performance, advanced ignition component designed to deliver reliable, consistent spark for improved combustion and increased power output. Its compact, self-contained design, digital control module, and compatibility with various ignition systems make it an excellent choice for automotive enthusiasts and high-performance applications.

The Holley 556-128 Performance Coil-near-Plug Smart Coil is a popular aftermarket ignition coil designed to provide improved performance and reliability for various applications, particularly in high-performance and racing engines. In this analysis, we will discuss the potential advantages and disadvantages of using this coil to help you make an informed decision.

1. High Output: The primary advantage of the Holley 556-128 Performance Coil is its high output, which can deliver up to 40,000 volts and 12.8 amps of spark energy. This increased spark energy can help improve combustion efficiency and power output in high-performance engines.

2. Adjustable Base: The Smart Coil features an adjustable base, which allows users to fine-tune the ignition timing for optimal engine performance. This is an essential feature for racers and tuners who require precise ignition timing.

3. Compact Design: The Holley Performance Coil has a compact design that can save valuable space in tight engine bays. It's also lightweight, making it an excellent choice for racing applications where weight reduction is crucial.

4. Durability: The coil is designed to withstand the rigors of high-performance racing and is built with high-quality components to ensure longevity.

5. Easy Installation: The Smart Coil is relatively easy to install, with a plug-and-play design that connects directly to the distributor or ignition system.

1. Cost: The Holley Performance Coil is more expensive than a standard OEM coil. This higher price tag may be a deterrent for some users, especially those on a tight budget.

2. Limited Compatibility: The coil may not be compatible with all engine applications, so it's crucial to verify that it's the correct choice for your specific engine before making a purchase.

3. Complexity: The adjustable base and advanced features may make the coil more complicated to set up and tune for some users, especially those with limited tuning experience.

In conclusion, the Holley 556-128 Performance Coil-near-Plug Smart Coil offers several advantages, including high output, adjustable base, compact design, durability, and easy installation. However, it also comes with some disadvantages, such as cost, limited compatibility, and complexity.

If you're looking for a high-performance ignition coil with advanced features and the ability to fine-tune ignition timing, the Holley Performance Coil may be an excellent choice for you. However, if you're on a tight budget, or if your engine application is not compatible with this coil, you may want to consider other options. Ultimately, the decision to purchase the Holley 556-128 Performance Coil-near-Plug Smart Coil depends on your specific needs, budget, and engine requirements.

Details:

Manufacturer: Holley, part number: 556-128, condition: new: ignition coil. Holley carburetors have powered every NASCAR sprint cup team and nearly NRA pro-stock champion for four decades. Although it is designed for high powered race applications, can be used on street driven vehicles as well. Coils/wiring harness/crimping tool required for installation;.

Maximum battery voltage 17.0 volts . Features: pre wired with 12ga power and grounds for optimal performance. Holley's products also include performance fuel pumps, intake manifolds engine dress-up for street performance, race and marine applications. Coil-near-plug smart coil; v8 kit; incl.

This coil is designed for use with Holley r hp and dominate ecus, as well other efi systems that can drive smart ignition coils.

specifications ignitioncomp:

• brand: Holley
• mpn: 556-128
• part type: Coil Plug
• performance part: Yes
• country/region of manufacture: United States
• upc: 090127002544

offer ignitioncomp:

• price: $749.95
• item condition: New
• in stock #: 5
• sold #: 20
• options: ship-to-home
• availability: in stock
• started: march 30, 2025

shipping ignitioncomp:

• transit: 3-5 days
• type: fixed
• class: standard
• service: standard

payments ignitioncomp:

• wallet: paypal
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• credit card: mastercard

returns ignitioncomp:

• time: 30 days
• paid by: seller
• policy: returns accepted

general ignitioncomp:

• category: Auto Parts > Car Truck Accessories > Ignition Systems Components

seller ignitioncomp:

• rating: 99.4%
• # reviews: 102979
• city: USA