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Denso Iridium Spark Plugs
Info provided by Mach V
Motorsports Audi/VW:
Iridium: Eight times stronger than platinum, six times harder,
and with a melting point 1200 degrees higher. New laser welding techniques make
it possible to make a spark plug with an iridium electrode. The electrode is a
needle-like 0.4mm in diameter! The result is a plug that requires less voltage
to spark, burns more of the fuel in the cylinder, and can spark at LEANER
air/fuel mixtures, resulting in higher horsepower and better
gas mileage.
Although the plugs are expensive, you don't have to change them as often as
garden variety spark plugs. The iridium electrode is extremely resistant to
erosion, so it can last MUCH longer than a normal plug.
It's the ultimate spark plug.
This was the most expensive plug I found but if they increase HP
and gas mileage it will be well worth it.
A picture Diagram explaining all the components can be found here
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