You are buying a set of 4 Patented Split Electrode Twin Electrode spark plugs to suit many models including Nissan, Suzuki, Mercury Marine, Seadoo, Yamaha etc. #SF409B

14mm Thread, 13/16" Hex, .472" reach, Gasket Type seat

Splitfire Spark Plugs exceed OEM quality and are precision engineered to give you 100% spark performance in all conditions.

Note that these spark plugs are high performance or racing spark plugs with two electrodes for even more sparking power. These feature the unique split electrode similar to a snakes tongue. This gives the spark even more places to travel ensuring full combustion and potentially more power.

The patented V design on the side electrode is instrumental in helping to improve combustion efficiency. Because the flame kernel is not blocked by the side electrode as in other spark plugs, it can travel upward through the "V" notch into the combustion chamber....That's the Splitfire "V" Advantage.

Splitfire V Design Spark Plugs feature:

• Patented Split or V Electrode
• Anti-fouling heat range control insulator
• Copper core centre electrode
• Nickle plated body and threads to prevent corrosion
• 12 month warranty (see www.Splitfire.com)
• As used by leading Australian workshops
• We have thousands of spark plugs in our warehouse to suit all model cars.