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Faster!Faster!
08-07-2006, 06:08 PM
Does anyone know of a higher performance plug I can use in my 400EX?

cals400ex
08-07-2006, 06:30 PM
No. you can run a colder or hotter plug but there isn't much benefit to that unless you need it. iridium may be the only higher grade plug you can get. however, the last time i checked they didn't even make the 400ex's plug in iridium. i wouldn't expect a gain anyways even with an iridium plug. plus, they are like $13 a piece or so last time i check. i would just run the regular NGK.

Faster!Faster!
08-08-2006, 07:17 PM
Hey, thanks for the info. I did'nt know if it would make a difference or not so I decided to ask.