M-12259-R301 Spark Plug Wire Set Fits 5.0/5.8L V8 Engines
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FORD PERFORMANCEPART NUMBER: 397-M-12259-R301

M-12259-R301 Spark Plug Wire Set Fits 5.0/5.8L V8 Engines

$5219$57.99You Save$5.80
ShippingShips on 09/08/2026
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Small Block
    Spark Plug Wire Set
  • Fits 5.0/5.8L V8 Engines
  • 9mm
  • 45° Boot
  • Red

    These Ford Performance M-12259-R301 9mm wires feature a spiral-wound suppression core for low resistance and minimum spark loss. They have tough silicone insulation to withstand high temperatures and voltage loss for minimum crossfire, and are highly resistant to fuels, oils, and solvents. Other features include 45 degree plug boots (most applications), stainless steel distributor cap terminals, and a coil wire (if applicable). The wires are numbered for each cylinder and have the "Ford Racing" script on them.

  • Wire-Wound Custom Ignition Wire
  • Features Low Resistance For Minimum Spark Loss
  • Silicone Insulation and Boots Withstand High Temps
  • Highly Resistant To Fuels/Oils/Solvents
  • Long Tough Stainless Steel Terminals
  • Incl. Coil Wire for Socket-Type Coil

  • FAQ

    Do high-performance spark plug wires make a difference?

    Absolutely, investing in high-performance spark plug wires, such as the M-12259-R301 model, can make a significant difference in your engine's performance. These wires are designed to efficiently conduct electrical energy, ensuring optimal spark delivery to the spark plugs. Improved conductivity and insulation provided by high-performance spark plug wires contribute to better combustion, enhanced throttle response, and increased overall engine efficiency, making them a valuable upgrade for performance enthusiasts.

    What are the best spark plug wires for performance?

    The M-12259-R301 spark plug wires are an excellent choice for performance applications, specifically designed for the efficient routing of spark plug wires in a 351w engine. These wires offer superior conductivity, heat resistance, and durability. Other top-performing spark plug wires often feature advanced materials like silicone or high-temperature boots, ensuring reliable performance under extreme conditions. When selecting spark plug wires for performance, it's essential to consider factors such as materials, design, and compatibility with your specific engine type.

    Does it matter what spark plug wires you use?

    Yes, the choice of spark plug wires does matter for engine performance. Quality spark plug wires, like the M-12259-R301, can improve ignition system efficiency, resulting in better combustion and overall engine function. Factors such as wire material, insulation, and design can impact conductivity and heat resistance. Choosing spark plug wires designed for your engine type and performance needs ensures proper spark delivery and contributes to optimal combustion, throttle response, and power output.

    Are all spark plug wires the same size?

    No, not all spark plug wires are the same size. The M-12259-R301 spark plug wires are specifically designed for the 351w engine, ensuring proper fit and efficient wire routing. Different engines may require wires of varying lengths and configurations to accommodate the specific layout and cylinder arrangement. When selecting spark plug wires, it's crucial to choose the right size and design for your engine to ensure proper installation and optimal performance.

Part TypeSpark Plug Wire
BrandFORD PERFORMANCE
Package Height3.7
Package Width7.9
Package Length9.1
Weight2.35 PG
Part CategoryPerformance Parts
Diameter (Mm)9
Distributor Boot MaterialSilicone
PositionN/A
ColorRed
Wire ColorRed
QuantitySold as a set
AssembledYes
Spark Plug Boot EndsEight 45 degree
Spark Plug Boot ColorBlack
Distributor Terminal EndsMale/HEI
Spark Plug Boot MaterialSilicone
Distributor Boot ColorBlack
Coil Wire IncludedYes
Rfi SuppressionYes
Conductor StyleSpiral core
Part FitmentSemi Universal
Boot Type45 Degree
Vendor Part NumberM-12259-R301
Package Qty1
Package TypeEA
No Questions
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