I used pp8's in both my saffs running stage 3 and
i do drive my cars hard,and never had a problem with them.

And as rizla said most of the tuners will tell you there fine
on a stg3 cossie.

you've may have had a problem with a set in the
past Damo but even the best sets of plugs are
sometimes duff,so you saying they are no good
"FACT" is in my eyes unfounded