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Improve combustion and help support higher power levels with these high performance spark plugs from HKS. These are a must have when running your direct injection engine with significantly higher than stock boost levels.
These "colder" plugs help transfer heat rapidly from the firing tip into the combustion chamber, keeping the tip colder than a standard plug with a lower heat transfer rate.
Fits all M177and M178 engines.
8 x HKS 1-step colder than factory plugs