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NGK Racing Spark Plug Heat Range 11 (R7420-11)

Regular price $42.50


NGK Racing Spark Plug Heat Range 11 (R7420-11) | ngk6448

We use these in our Rx8 NA platform - Rx8 engines prefer to run much leaner than standard rotary applications and transferring the heat of the spark plug to the coolant system is preferred. We highly recommend you do not use these spark plugs for starting your engine for the first time / engine break in period. There is a high chance that the spark plugs can get fouled out during that period. 

What is included:

  • 1 x NGK R7420-11 plug 


NGKs Description:

From professional racers with extremely modified engines to the weekend warrior, all levels of performance enthusiasts count on the advanced technology built into NGK Racing Spark Plugs.

To withstand the severe conditions that occur in racing engines, NGK Racing Spark Plugs feature electrode materials and configurations as follows:

• Electrode materials - Many use precious metals such as platinum or gold/palladium for greater durability and lower voltage requirements.

• Electrode configurations - Fine-wire center electrodes provide better sparking and enhanced ignitability. Fine-wire ground electrodes further improve the ignitability of the plug.

• Insulator configurations - Special configurations are used for the insulator noses to improve throttle response.

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