NGK 6700 Spark Plug

NGK Laser Iridium Spark Plug 6700 for Mazda RX-8

NGK 6700 is a Laser Iridium spark plug built for precise ignition performance and OE-style serviceability. It is a direct fit for 2004-2011 Mazda RX-8 applications and uses an iridium center electrode with a platinum ground electrode for stable spark delivery.

Key Features

• Laser Iridium spark plug from NGK’s Laser Iridium product line
• Part number 6700, also identified as RE7C-L
• Iridium center electrode tip material for consistent ignition performance
• Platinum ground electrode core material with pin-type tip design
• Pre-gapped at .044 inch
• Flat seat, 14 mm thread diameter, 21.00 mm reach, 13/16 hex size
• 5000 ohm resistance and heat range 7
• Non-removable nut terminal for standard ignition connection

Product Details

NGK’s Laser Iridium line is built around OE-focused ignition technology and long-term durability. Part number 6700 combines an iridium center electrode with a platinum ground electrode to support reliable spark formation, while the copper core helps manage heat transfer. For drivers searching for a Mazda RX-8 spark plug replacement, NGK 6700 offers the correct fitment and specifications for 2004-2011 Mazda RX-8 models. This part cross-references DENSO Auto Parts 5754 for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition output
• Misfire conditions related to degraded plug electrodes
• Reduced throttle response from weak spark delivery
• Service replacement needs for Mazda RX-8 ignition maintenance

Installation Notes and Tips

Fits 2004-2011 Mazda RX-8, leading. Verify the specified gap before installation and confirm the flat seat, 14 mm thread diameter, 21.00 mm reach, and 13/16 hex size match the engine requirements. Use the vehicle’s service information for torque and replacement interval guidance. For Mazda RX-8 ignition service, part number 6700 should be matched to the listed OE-style application before installation.

Quality Assurance

NGK is a major OE spark plug supplier in North America with decades of automotive manufacturing experience. The brand’s OE background and broad application coverage support consistent product standards for domestic and import vehicles, including Mazda RX-8 applications.