Yes my wires were worn out a couple of months back, have taped it for some extension.
I always use 4 tip plugs in my Cultus, it gives better fuel efficiency for me, 120 Kms on full AC usage in city driving.
Yes but this does not effect on performance that much though. I use Lucas 4 tip plugs, costing 250 each. They are durable also to some more extent that if one tip gets worn out the spark is still utilized to the most by the remaining tips.
I think if car is tuned properly on 4 tips, they might give better response also. And I seriously disagree that Cultus will misfire and does not run smoothly on high speed with 4tip plugs.
The plug wires available in Rs. 750, I have seen, I dont like them. The build quality is not good. I'm looking for something that is more in mm and quality.