I was looking at Magnecor leads in the burton power catalogue and it says either 8mm or 8.5mm for the zetec

thing is the 8mm ones are blue and the 8.5mm are red - but i want blue leads to go with everything else in the bay being blue!

The spiel in the book makes the 8.5mm ones sound a lot better so my question is...are they?

Will i notice a difference between the two if i was to plump for the blue ones?

Maybe i should stop being a puff and just get the red beasts

will be used on a 350-400bhp zetec turbo if that matters

Thanks a lot