Friday, 9 August 2013

 
The spark plug on the right is the NGK racing version of the normal plug on the left. the smaller size of the central electrode is quite noticeable.

 
The reverse is true of the plug body as the racing plug has a significantly thicker body.

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1 comment:

  1. billbrownandhisnorton blog17 August 2013 at 07:11

    You can occasionally get racing plugs in Halfords but I am not convinced they are really top racing quality.

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