Spark plug?

[Redoliander]

I know this has been talked about alot, but what plug should I use? I pulled out a ngk dp7ea. But I've read u should use a dp8ea or dp9ea. So should I get one the same as what I pulled out or an 8 or 9?

[FZR 1000]

Here you go http://www.ngkpartfinder.co.uk/

[Redoliander]

Thanks. Looks like I'll take these d7ea plugs back and get the d8ea.