What are Iridium spark plugs? Are they really an upgrade over the stocks ones? And finally are they worth the extra money? These are just some of the questions we intend answering in the course of this product review.
Now we have gone for the complete NGK Iridium spark plug kit that includes low resistance or high tension lead cables or spark plug wires (call it what you will). There are new suppressor or resistor caps with improved insulation at both cap ends. And the ‘stars’ of this review – the Iridium IX spark plugs. The complete kit is sold specifically for the Royal Interceptor 650 by Ngage Powerparts in India and it costs Rs 4,500. If you just want the plugs, it should cost you just under Rs 800 a piece.