

as the poster says, the smaller iridium tip creates a brighter spark, burning the fuel more efficiently, creating more power or better fuel economy, depending how you drive.

I've used them for years without a single problem.

There is a noticeable increase in responsiveness.

thicker aftermarket leads will feed more power to the plugs.

Don't be put off by people claiming magnacor leads are crap, the extra 3mm core gives even more throttle response.

The holes around the fitting for the cap can get clogged with oil/dirt

& pop off but that's not a problem if you're keeping the car tidy.

The only other issue I've heard with them turned out to be the wrong leads

(for an earlier model).

Once again, I've used these for years without a problem.
