As there are no iridium mentioned in the manual I installed the best possible solution.
I am getting a lot if improvement in engine response, pick and stable idling. I have a swift also in which I have recently installed Denso IK20. But I think NGK are better not only in performance but also in looks and finishing. Denso finishing specially where the iridium alloy is welded was not clean and good at. Results however are acceptable.
Plugs installed in cuore are in pictures. Got them from Rehmania Auto Gawal Mandi Rwp @ Rs 800 each.
Nadir Auto at Gawal mandi also has a lot of variety of plugs.