Best Spark Plug Wires for SBC With Headers

When it comes to optimizing the performance of your Small Block Chevy (SBC) engine with headers, selecting the right spark plug wires is crucial. Spark plug wires play a pivotal role in ensuring efficient combustion, minimizing interference with header tubes, and enhancing overall engine performance. In this guide, we’ll explore the top options for spark plug wires that are tailored for SBC engines equipped with headers.

1. Why Spark Plug Wires Matter


Here are some of the best spark plug wire options tailored for SBC engines with headers:

a. MSD Super Conductor Spark Plug Wires

  • Features:
    • High-quality copper alloy conductor for minimal resistance.
    • 8.5mm thickness for maximum spark energy transfer.
    • Silicone boots and a helically wound conductor to suppress EMI.
    • Heat-resistant up to 2,000 degrees Fahrenheit.
  • Benefits:
    • Exceptional performance in high-heat environments, ideal for headers.
    • Low resistance for improved spark delivery.
    • Available in custom fit sets for SBC engines.

b. ACCEL 300+ ThunderSport Spark Plug Wires

  • Features:
    • 8mm Ferro-Spiral core for optimal conductivity.
    • Silicone jackets for high-temperature protection.
    • Precision-wound, low resistance conductor.
    • Ideal for performance and racing applications.
  • Benefits:
    • Excellent heat resistance and durability, making them suitable for headers.
    • Enhanced throttle response and power output.
    • Easy installation with numbered wires.

c. Taylor Cable 8mm Spiro Pro Ignition Wire Set

  • Features:
    • Spiro-Wound core with stainless steel wire.
    • 8mm thickness for efficient energy transfer.
    • High-temperature silicone boots and jackets.
    • Available in various colors and configurations.
  • Benefits:
    • Resistant to heat and abrasion, ensuring longevity in header-equipped engines.
    • Low-resistance design for maximum spark energy.
    • Customizable options for a personalized look.

d. Moroso Ultra 40 Race Spark Plug Wires

  • Features:
    • 8.65mm diameter for high energy transfer.
    • Kevlar core for strength and durability.
    • High-temperature boots and sleeves.
    • Race-proven performance.
  • Benefits:
    • Specifically designed for racing and high-performance SBC applications.
    • Resistant to header heat and abrasion.
    • Reliable spark delivery for consistent combustion.

3. Factors to Consider When Choosing Spark Plug Wires

While the options mentioned earlier are among the top choices, there are several factors to consider when selecting the best spark plug wires for your SBC engine with headers:

a. Heat Resistance: Headers generate a significant amount of heat. Look for spark plug wires with high-temperature silicone jackets and boots to ensure they can withstand the extreme temperatures without deteriorating or causing misfires.

b. Wire Thickness: Thicker wires, such as 8mm or 8.5mm, often provide better spark energy transfer. This can lead to improved combustion efficiency and power output. However, thicker wires can be less flexible, so ensure they fit your engine’s configuration.

c. Resistance: Lower resistance wires are better at transmitting electrical energy efficiently. This results in stronger and more consistent sparks. High-quality wires typically have low resistance levels.

d. Core Material: Different spark plug wires use various core materials. While copper and stainless steel are common, some high-performance wires use materials like Kevlar. The core material can impact durability and conductivity.

e. EMI Suppression: Electromagnetic interference (EMI) can disrupt electronic components in your vehicle. Look for spark plug wires with EMI suppression technology, such as helically wound cores, to minimize radio frequency interference.

f. Custom Fit vs. Universal: Some spark plug wire sets are custom-tailored for specific SBC engine configurations, ensuring a perfect fit. Universal sets may require more adjustments during installation but can be adapted to various setups.

g. Budget: Consider your budget when choosing spark plug wires. While premium wires often offer superior performance and longevity, there are budget-friendly options that provide excellent value without breaking the bank.

Installation Tips

Proper installation is crucial to maximize the benefits of your chosen spark plug wires:

  • Follow Manufacturer Instructions: Always follow the manufacturer’s guidelines for installation, including torque specifications for spark plug terminals and distributor ends.
  • Routing: Carefully route the wires to avoid contact with hot exhaust components or sharp edges that could cause abrasion.
  • Wire Length: Ensure that the wires are the correct length for your specific engine and header configuration to prevent excess slack or tension.
  • Secure Connections: Make sure all connections are secure and free from dirt or debris that could impede electrical conductivity.
  • Regular Inspection: Periodically inspect your spark plug wires for signs of wear, damage, or degradation. Replace any wires that show signs of deterioration promptly.

Best Spark Plug Wires for Small Block Chevy (SBC) With Headers

BrandModelWire MaterialResistance (ohms/ft)Features
MSDSuper ConductorCopper40Low resistance, suppresses EMI
Taylor Cable8mm Spiro-ProSilicone50350 ohm/ft inductance, heat protection
AccelExtreme 9000Ferro-Spiral150High RFI suppression, heat resistant
MorosoBlue Max 8mmSilicone50Fiberglass braiding, low resistance
Denso7mm Iridium PowerIridium2,000Increased power, efficient combustion
NGKV-PowerCopper3,000Enhanced ignitability, economical
ACDelcoProfessionalKevlar core500High-strength, durable
BoschPremiumStainless steel800Improved conductivity, longevity
PerTronixFlame-ThrowerSilicone1,500Low resistance, corrosion-resistant
JEGS8.0mmSilicone350Ultra-low resistance, high performance

Key Considerations for SBC Spark Plug Wires with Headers

Heat ResistanceSpark plug wires near headers can be exposed to high temperatures; choose wires with heat shielding.
Low ResistanceLower resistance allows for more efficient power delivery and better spark energy.
SuppressionWires with EMI/RFI suppression technology help reduce interference with other electronic systems.
Wire MaterialDifferent materials (copper, silicone, iridium, etc.) have varying conductivity and durability.
Length OptionsEnsure the chosen wires are available in appropriate lengths to reach from distributor to plugs.

Installation Tips for SBC Spark Plug Wires with Headers

Wire RoutingRoute wires away from high-heat areas like headers, and use separators to prevent contact and rubbing.
Proper Gap SettingSet spark plug gaps according to your engine’s specifications for optimal combustion and performance.
Secure ConnectionsEnsure secure connections at both the distributor cap and spark plug ends to prevent misfires.
Anti-Seize on ThreadsApply a small amount of anti-seize compound to the spark plug threads to ease future removal.
Test and AdjustAfter installation, start the engine and check for any misfires or irregularities, then adjust as needed.

Common Symptoms of Failing Spark Plug Wires on SBC Engines

MisfiresEngine misfires, hesitates, or runs roughly due to inconsistent spark delivery.
Poor Fuel EfficiencyFailing wires can lead to incomplete combustion, resulting in decreased fuel efficiency.
Increased EmissionsInefficient combustion caused by faulty wires can lead to higher levels of pollutants in emissions.
Rough IdlingEngine idles unevenly or vibrates excessively when the spark isn’t reaching all cylinders.
Poor AccelerationWorsened acceleration and reduced power when spark plugs fail to ignite the air-fuel mixture.

Steps to Replace SBC Spark Plug Wires and Headers

Gather MaterialsCollect new spark plug wires, necessary tools, and ensure the engine is cool before starting.
Remove Old WiresCarefully disconnect old wires from distributor cap and spark plugs, noting their routing.
Route New WiresRoute new wires following the proper path, using separators and heat shielding near headers.
Connect and SecureAttach the new wires to the distributor cap and spark plugs, ensuring snug and secure connections.
Test and VerifyStart the engine, check for proper functionality, and make any necessary adjustments.


Choosing the best spark plug wires for your SBC engine with headers involves considering factors like heat resistance, wire thickness, core material, and your budget. These wires are a vital component in optimizing your engine’s performance, ensuring efficient combustion, and preventing interference from the headers. By selecting the right spark plug wires and installing them correctly, you can enjoy improved throttle response, increased horsepower, and a more reliable ignition system for your SBC engine with headers.


Best Spark Plug Wires for SBC With Headers

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