NGK V-Power Race Plug Set

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These plugs have proven themselves time and time again.  They are non-resistor plugs so they allow for the full spark energy to be ran through your electrode!  A quick potential solution for those with ignition break up under boost.  Resistors have been common in modern engines to reduce ignition noise, due to the placement of the plug in the Miata, they don't seem to be prone to this interference or noise. 

4 x NGK V-Power Racing Plugs (choose temp)
Factory Heat Ranges:
90-93: 6
94-05 (Including MSM/Turbo): 5
06-15: 6
For turbo applications and beyond the factory MazdaSpeed Miata boost level we recommend 7 heat range plugs.