NGK DPR8EA-9 Spark Plug - 12mm Thread (Long Reach)

The NGK DPR8EA-9 is a colder heat range long-reach spark plug engineered for high-performance, high-compression, or turbocharged Volkswagen aircooled engines. It’s particularly suited for engines fitted with CB Performance Magnum cylinder heads or other aftermarket heads requiring a 12mm x 1.25 thread and 18mm reach.

The colder heat rating (8) allows this plug to dissipate heat more effectively, preventing pre-ignition and knock in engines producing higher cylinder temperatures. This makes it ideal for tuned, forced induction, or hard-driven engines.

With a projected insulator tip, the DPR8EA-9 improves flame propagation for cleaner, more efficient combustion, while the resistor element suppresses electrical interference to protect ignition and electronic systems. Its copper-core electrode ensures maximum conductivity and consistent spark strength under extreme operating conditions.

Precision-engineered by NGK for durability and performance, this plug offers excellent fouling resistance and reliability for demanding VW builds — perfect for motorsport or fast-road use.

Key Features:

• Genuine NGK DPR8EA-9 long-reach spark plug
• Designed for high-performance, turbo, or high-compression VW engines
• Suitable for CB Performance Magnum cylinder heads and other 12mm plug applications
• Colder heat range (8) – ideal for engines producing extra heat
• Thread size: 12mm x 1.25
• Thread reach: 18mm (long reach)
• Spanner size: 21mm
• Copper-core electrode for excellent spark and heat transfer
• Projected insulator for efficient combustion
• Resistor type – suppresses electrical interference
• M4 terminal type
• Sold each – 4 required per engine

Applications:

• VW Aircooled Type 1, Type 2, Type 3 high-performance engines
• CB Performance Magnum Heads and other long-reach 12mm plug heads
• VW engines with turbo, supercharger, or high-compression builds
• Ideal for race-prepared or performance street VW Beetle, Karmann Ghia, and Type 2/3 engines

NGK Code Explained:

• D – 12mm thread diameter
• P – Projected insulator type
• R – Resistor plug (reduces interference)
• 8 – Heat range (2 = hot, 10 = cold; 8 = colder for performance/turbo use)
• E – 18mm long thread reach
• A – Special design features
• 9 – Spark plug gap (0.9mm)

Specification:

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