- Fine-Wire Double Platinum features Platinum pad on both electrodes. Extended service intervals (on all except Nickel and Standard Copper Core plugs), Proprietary platinum pad on side wire electrode (on Platinum-Iridium and Fine-Wire Double Platinum plugs).
- Platinum-Iridium plugs feature Iridium-enhanced center electrode. Platinum-Iridium plugs can be used in any engine regardless of ignition system.
- High-Strength Steel High Thread spark plugs for 3-valve Triton engines redesigned.
- New, high-strength steel shell, Nickel-plated shell for corrosion resistance, Scavenger area allows for more carbon build-up before misfires occur, Full ground strap helps for better heat transfer within the combustion chamber, Thicker insulator for better misfire prevention.
- Spark plugs are matched to the engine for optimum engine performance.
- Spark plug designs include continuous improvements, Resist oxidation and arc erosion, Multi-rib insulator protects against misfire, Nickel-plated shell for corrosion resistance (on all except Standard Copper Core), High-Strength Steel High Thread, Platinum-Iridium, and Fine-Wire Double-Platinum feature 0.8 mm fine-wire design.
- The only parts recommended by Ford Motor Company for Ford, Lincoln, and Mercury vehicles.
Motorcraft SP-521 SPARK PLUG
- The spark plug-engine matched combinations are durability tested for long life, no misfires, reduced fuel consumption and optimum emissions.
- Spark plugs are tested to Ford specifications for performance and emissions.|Designed to meet strict Ford engineering standards for functionality and durability.
- Designed to meet strict Ford engineering standards for functionality and durability. ;Spark plugs are tested to Ford specifications for performance and emissions. ;The spark plug-engine matched combinations are durability tested for long life, no misfires, reduced fuel consumption and optimum emissions
$8.12
77 in stock77 in stock
| Make | Model | Year |
|---|---|---|
| Ford | E-150 | 2009 - 2014 |
| Ford | E-250 | 2009 - 2014 |
| Ford | E-350 Super Duty | 2009 - 2019 |
| Ford | E-450 Super Duty | 2009 - 2018 |
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