Spark plugs BPR4ES-11 E18-6657SDS Drag 1975-1999 Big Twin

Spark plugs BPR4ES-11 E18-6657SDS Drag 1975-1999 Big Twin

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Performance BPR4ES-11 Drag Specialties 21030198 spark plugs for 1975 to 1999 Big Twin Harley-Davidson.

Brand: Drag Specialties Product
reference: 21030198
Manufacturer reference: E18-6657SDS OEM
reference: BPR4ES-11
Type: Spark plug
Model: Copper – Resistor Type
Packaging: Pair

Performance spark plugs designed to optimize combustion and ensure reliable ignition on Harley-Davidson Big Twin engines.

Thanks to their high-end design and superior materials, they offer excellent thermal resistance, perfect sealing, and increased durability.

Technical specifications:

  • Type: BPR4ES-11

  • Thread: 12 mm

  • Thread length: 19.1 mm (3/4")

  • Hex key: 16 mm (5/8")

  • Thermal rating: 4

  • Type: Resistive

  • Center electrode: Standard projected

  • Electrode material: Nickel alloy

  • Ground electrode: Single standard

  • Insulator: 95% pure alumina

  • Body: Black ceramic

  • Nut: Removable

  • Multi-layer seals

  • Gas-tight hot crimping

  • Anti-oxidation coating

Compatibility:

  • Harley-Davidson Big Twin 1975 to 1999

Condition: New Original
product (Drag Specialties)

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