Whats the best big power spark plugs?

[turbomook]

I've currently got Denso IK27 plugs fitted to the cosworth, but they say good for 500bhp?

Is there better ones for running more power?

Thanks

[James @ Auto Dynamix]

You should really only take the advise of your tuner on this

[twin turbo]

071 motorcraft...

[GARY F]

IK31's

[lunes86]

IK31's

Agreed!

[cossiedavid]

I run ik27 s at 540bhp cossyking rus them in his at 680 if there was any thing wrong with them mark mad would tell us /you

[turbomook]

Cheers for the info.. Yeah i might be best going for IK27 again as thats what ive taken out.

[AJC]

Just need a big power car now then

[turbomook]

Just need a big power car now then

That's racing talk gay lord!! Haha

[dave green]

071s