NGK 6700 RE7C-L Laser Iridium Spark Plug for 2004-2011 Mazda RX-8 1.3L R2

Vehicle Fitment

• 2004-2007 Mazda RX-8 Base / Shinka / R3 (1.3L R2 Rotary, RWD)
• 2008-2011 Mazda RX-8 Sport / Grand Touring / 40th Anniversary (1.3L R2 Rotary, RWD)

Features

• Laser Iridium fine-wire center electrode for long service life
• Platinum ground electrode pad for even wear in distributorless ignition
• 98% pure copper core for excellent heat dissipation
• High-grade alumina ceramic insulator for reliable spark stability
• Trivalent metal plating for corrosion and anti-seize protection
• Flat seat design engineered for rotary engine chambers
• Pre-gapped for OE-style performance
• Resistor type to suppress electrical system interference

Specifications

• NGK Part Number: 6700 / RE7C-L
• Thread Diameter: 14 mm
• Thread Pitch: 1.25 mm
• Reach: 21 mm
• Heat Range: 7 (NGK scale)
• Seat Type: Flat with crush washer
• Center Electrode: Iridium on copper core
• Resistor: Yes (~5000 Ω)
• Gap: Approx 0.044" (1.1 mm)

Included Components

• 1x NGK 6700 RE7C-L Laser Iridium Spark Plug
• 1x Crush washer gasket

Product Description

The NGK 6700 (RE7C-L) Laser Iridium Spark Plug is engineered for performance and durability in rotary engine applications, most notably the Mazda RX-8. Its fine-wire iridium center electrode and platinum ground pad provide exceptional wear resistance and consistent spark delivery over long service intervals, often outlasting conventional plugs. The 98 % pure copper core and high-grade ceramic insulator promote reliable ignition performance and excellent heat management - especially important in high-revolution rotary chambers where proper combustion is critical.

Specifically designed to match the OE requirements of the RX-8's 1.3 L rotary engine, this plug offers a direct replacement that maintains factory-level efficiency, throttle response, and drivability. Its resistor design also helps reduce electrical noise that can affect engine sensors and ignition electronics. Always verify the correct gap and torque specifications from the Mazda service manual before installation. Fitment confirmed through 2011. 2012+ coverage unconfirmed and not standard for this part.