Need help finding good aftermarket spark plug for WR400F

I've got a 00' WR400F with a few mods and I'm looking to do a high performance tune-up on it and I've been running into trouble trying to find high performance spark plug and plug wire for it. All I've been able to find is a plane jane NGK plug so far. Who makes the best high performance plugs and wires for dirt bikes? I need help fast because I'm looking to do the tune-up on tuesday this week.

Years ago Dirt Bike magazine done test with a dyno on spark plugs and horse power. The br8es made more power than the G or the V plug. :naughty: I think the results pointed out that standard S plug made more power because of the direction of the ground electrode :naughty:

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