Iridium plugs upgrade.
Thinking of changing the stock spark plugs for some iridium ones.
Is it worth doing ? as they cost quite a bit more.
Will i gain any performance or increase in power of any kind as a friend of mine has put some in his motorbike and says they worked wonders for him.
Found a supplier selling NGK OR DENSO with the denso ones costing more.Which is a better plug out of these two?
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2002 1.8 T Avant
18" TT Quattro Replicas
Forge Motorsport DV
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