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Anyone knows the difference between an iridium spark plug and a stock one?It is 5 times more expensive.Does it worth it ?Can you feel the difference ?
 

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Oh, almost forgot.

Can you feel the difference?

Whell i must say it's marginal if at all, maybe phsycological, but I think it feels smoother with these. But i may have talked myself into this :-/

I run DPR8EIX-9 (std Heat Range) & I also have a set of
DPR7EIX-9 (1 colder) to try, haven't put the 7's in yet, not sure if they will be of benifit, but from past experience with Street Drags, colder was better with increased HP & Avgas.
 

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the only difference is in the tendency for the gap to
change as the electrodes erode. platinum and
other noble metal electrodes will remain properly
gapped longer than conventional plugs.
 
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