I honestly wouldnt worry about 'uprated leads'. Standard 7mm leads are all that you need, and any bigger will not make a blind bit of difference in the real world (apart to you bank account). Just get OE spec ones from GSF/ECP etc..... At least you know they will be decent quality, and have a proper warranty in comparison the the multitude of colour uprated 8mm stronger spark and better detonation blah blah blah sh!te you will see on ebay, that corrode and break down within a year!