NGK DPR7EA-9 Spark Plug - 12mm Thread (Long Reach)

The NGK DPR7EA-9 is a long-reach, copper-core spark plug designed for use in high-performance air-cooled Volkswagen engines fitted with aftermarket or performance cylinder heads, such as the CB Performance Magnum range. This spark plug provides excellent ignition reliability and superior heat dissipation, essential for engines running higher compression or modified airflow characteristics.

With a 12mm thread diameter and 18mm thread reach, the DPR7EA-9 is ideal for heads that require a slimmer, deeper-reaching plug. Its projected insulator design improves combustion efficiency and throttle response, while the built-in resistor reduces electrical interference—protecting modern ignition and electronic systems.

The copper-core electrode ensures reliable spark performance, while the 9 plug gap specification provides a balanced ignition arc suited for performance-tuned engines. NGK’s reputation for quality guarantees consistent performance, durability, and excellent fouling resistance, even under high-load or high-temperature conditions.

Key Features:

• Genuine NGK DPR7EA-9 long-reach spark plug
• Ideal for performance cylinder heads such as CB Performance Magnum
• 12mm x 1.25 thread, 18mm reach, 21mm spanner size
• Projected insulator for improved combustion efficiency
• Built-in resistor (R) for EMI suppression
• Copper-core electrode for excellent conductivity and heat transfer
• Designed for high-compression or modified air-cooled engines
• M4 terminal type
• Sold each – 4 required per engine

Applications:

• VW Aircooled Engines (Type 1 & Performance builds)
• CB Performance Magnum Cylinder Heads
• High-performance VW Beetle, Karmann Ghia, Type 2, Type 3 engines with long-reach 12mm plug fitment
• Suitable for custom or race engines using 12mm long-reach spark plug specification

NGK Code Explained:

• D – 12mm thread diameter
• P – Projected insulator type
• R – Resistor plug (reduces electrical interference)
• 7 – Heat range (2 = hot, 10 = cold; 7 = medium heat rating)
• E – 18mm thread reach (long reach)
• A – Design features (specific construction design)
• 9 – Spark plug gap (0.9mm)

Specification:

• Thread size: M12 x 1.25
• Thread reach: 18mm
• Spanner size: 21mm
• Terminal type: M4
• Electrode core: Copper
• Resistor: Yes
• Spark plug gap: 0.9mm
• Quantity: Sold each