Hello people. I have just bought bosch spark plugs FR7KPP33+ for my 2006 320i and bosch recommends FR7KPP332. The guy who sold them to me from the auto spares told me they were an upgrade for the old FR7KPP332. I have this hunch that he might be wrong. The ting is the FR7KPP332 electrode gap is 1mm and FR7KPP33+ is 0.7mm will this affect my car's performance or I must just take them bak and request the original FR7KPP332, please help me.