What is the NGK part number for the NGK Iridium plug?

Thanks.

Manny

 

for Type-S: NGK Iridium IX Spark Plugs, ZFR6FIX-11, P.N. 6441

 

Thanks!

 

Any quality or performance difference between the Denso IK20 and the NGK ZFR6FIX-11 iridium plugs?

I know the NGK plugs cost much less.

 

it looks the same to me.... so no difference I guess.. just lower price. I will replace at 30 kmiles.

 

dj5,

You should see a substantial difference between the two look for about 10hp and maybe 5-6 mpg better mileage. Only kidding, you will see no difference between the stock plugs or either of the iridium plugs. The difference will occur when you replace old and worn plugs, with any new plug.

There are a lot of articles on the web that talk to all the markting hype surrounding plugs, do a search and see for yourself.