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When it comes to plugs it is all personal choice. If you are planning a daily driver with a weekend racer have 2 sets of plugs.
1. A colder plug for (track/racing events) where the engine is keeping higher revs and can aid from the benefit from the plug.
2. A milder plug for day to day driving (what ever the man. rec.)
Also keep in mind power adders as well, super/turbo charges, NOS, ECU tuning as well.
The only plugs I avoid are ones with small electrodes. (IE Bosch plat. series plugs.) Personal experiance has taught me that one. 1 small piece of carbon lodged in the electrode and caused a missfire.
Also try different gaps as well when switching out plugs each engine and tune is different and the car will respond differently based on fuel burn and tuning.
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