Hi I have a Toyota Corolla w reg 1.4 VVti. I went to Halfords ( I know ) and the only plugs they had were the super 4. Their specs recommended fr
78 x but I cannot get any confirmation that these are suitable - no, I don't trust Halfords. Any place I can verify? I have spent an hour searching the web but no joy. Are these plugs worth the extra? Thanks, Paul.