NGK 6701 Laser Iridium Spark Plug for 2004-2011 Mazda RX-8 Rotary Engine

Vehicle Fitment

• 2004-2011 Mazda RX-8 (1.3L RENESIS rotary engine; trailing spark plug position)

Features

• Laser iridium center electrode for high durability and performance
• Platinum ground electrode for consistent wear and long service life
• Copper core for excellent heat dissipation and conductivity
• Resistor type spark plug reduces electrical noise interference
• OEM-equivalent quality for reliable ignition performance
• Engineered for efficient combustion and improved throttle response
• Corrosion-resistant ceramic insulator for long life
• Precision gap factory set for rotary engine requirements

Specifications

• Part Number: 6701 (NGK Laser Iridium, RE9B-T equivalent)
• Thread Size: M14 x 1.25
• Reach/Thread Length: 19 mm
• Heat Range: 9 (suitable for high-revving rotary engines)
• Seat Type: Gasket
• Gap Size (preset): ~0.048 in (factory specification)
• Resistor: Yes (≈ 5000 Ω)
• Electrode Materials: Iridium center; platinum ground
• Hex Size: 20.8 mm (13/16")

Included Components

• 1x NGK 6701 Laser Iridium spark plug

Product Description

The **NGK 6701 Laser Iridium spark plug** is a performance-oriented ignition component designed specifically for the **Mazda RX-8's 1.3L rotary engine**. Featuring an iridium-tipped center electrode and a platinum ground electrode, this plug delivers exceptional durability, precise ignition performance, and longer service life compared to standard plugs. Its resistor construction also helps reduce electrical interference in distributorless ignition systems.

Built to meet or exceed OEM standards, the 6701 spark plug provides reliable combustion and efficient throttle response - especially important in the high-revving architecture of the RX-8's rotary engine. With its factory preset gap and excellent heat range characteristics, the NGK 6701 plug is a direct fit and performance upgrade for maintaining peak engine efficiency and smooth operation.