Come on guys, he asks a legitimate question doesnt he. Yes when we are talking a brand new car there is not going to be a discernible gain from changing plugs and its probably not a good value for money upgrade.. But, the better spark you get to the combustion chamber the cleaner the burn which equals less emission, slightly better response and better economy. Again on a new car it would be barely noticeable but you can always get a better spark so he didnt ask a stupid question...
As for those spark plugs that give 10psi boost, where can i get some of them?? lol.
Just hold onto your current plugs atm mate, put the money into something else for the moment... Up to you though..
Originally Posted by crx51
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