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D4F Proton Savvy needs help

  Proton Savvy D4F
hi guys,
Can i know what kind of modification can be done to the engine ?
This engine hardly mod in Malaysia because not many people here know about this engine.
Im curently looking for a suitable SparkPlug, Plug Cable, and others to make the car go faster ?
Please let me know
So long as the old pugs arn't worn there no point chnaging them new ones won't make any difference.