NGK V-Power™ Racing

NGK's V-grooved center electrode moves the spark to the outer edge of the electrode for improved ignitability in all combustion chamber conditions. This configuration is especially helpful for throttle responsiveness, quicker corner exits, and more power on the bottom end in a drag race engine.

NGK V-Power Racing Spark Plugs are available in a wide variety of heat ranges to fit most drag race, circle track or road racing applications. The high-purity alumina silicates used in the insulators of NGK Spark Plugs helps keep the spark plug tip warm enough to burn off deposits at low-speed, yet still be able to transfer enough heat during high-speed operation to prevent detonation and pre-ignition.  This is a performance/racing-type spark plug from NGK’s V-Power/Racing line. It has a 14 mm thread, 0.750″ (19 mm) reach, flat gasket seat, heat range “8,” and is a non-resistor plug designed more for high-performance/racing use than specific OEM replacements.  Enthusiasts often use R5671A-8 plugs in modified performance engines (e.g., turbo/supercharged Honda setups) because of the heat range and construction.  It’s generally chosen for racing or high-output builds rather than stock replacement in street vehicles — unless your OEM specs align.

Please See Engine Fitment summary Below:

Please note that summary is for both US Domestic Market and Japanese Domestic Market vehicles:

Please See Product Specifications Below:

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Reach19mm (3/4")
• Hex Size5/8" (16mm)
• Terminal TypeSolid
• Overall HeightISO
• Gap.031" (0.8mm)

• Center Electrode
• MaterialNickel
• TypeV-Cut
• Size2.5mm
• ProjectionNon-Projected

• Ground Electrode
• MaterialNickel
• TypeStandard
• Quantity1

• Specifications
• ResistorNo
• Resistor Value1K Ohm
• Heat Range8
• FeaturesCopper gasket
• Torque SpecsCast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.

• Part Information
• BrandNGK/NTK
• Longevity30k Miles