Markley02

I went to sparkplugs.com http://www.sparkplugs.com/results_app.asp?aaia=1432585 and they list the Autolite XP3924 as "Original Equipment Manufacturer and/or Original Equipment Equivalent"

Has anyone used these plugs in an Evo IX yet? I know the popular ones are the NGK ILFR7H's, but that doesn't mean they are the best.

The only thing that bugs me is the NGK's have a reach of 26.5mm and the Autolite's only have a 19mm reach. Who says longer is better though? (haha I am talking about if longer is better) I am not even trying to be cheap or anything, just trying to get rid of my p0300. Will I hurt anything if I try the autolites?

Mr. Evo IX

iTrader: (5)

Those wont work in your IX. Yes, they have been tried. Probably a mistaken listing as someone else tried these plugs and they didnt work well under boost.

Longer is better when the short ones dont reach the combustion chamber.

Markley02

Did some more research and sparkplug.com also has the plug listed for the Evo VIII. Given that it is the same reach as all the other VIII plugs this must be for the VIII and not the IX!