Great spark plugs for performance or if your original spark plugs are misfiring which was in my case from carbon fouling. These spark plugs come with an additional crush washer to stop you from over tightening the spark plugs. After installation straight away from start up my exhaust tone (cold air induction plus custom high flow cat back 2 inch system) changed to a more burbling tone which I liked and could tell it already made a difference as it seemed like it was completely combusting the air fuel mixture for increase economy and performance. I actually did test it and it took off 2/10th of a second off my 0-100km/h launch with my built in car lap timer which is amazing for something that simple and cheap to change. (Mind you I have R8 custom ignition coils to fit shorter 1.8TFSI as well)Read full review
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