Can anyone advise how to upgrade ignition system of the car? I got diff opinion form different shop. Don't want to simply follow anyone without understanding. Any pro-electric people or people who got experience can advise please?

Initially I wanted to upgrade to Bosch platinum-Iridium +2. Got 2 "leg". Hehe... Sorry don't know the right term for that.

Then Another shop suggested to upgrade the cables also. When I almost did so, they told me "aiya, if upgrade to better cables, scared...