airfilter

Hi everyone. Im new to this.. its my first car and doing my first upgrade, I was just wondering if this was correct, posted this on another forum and got some pretty harsh comments, Please be kind any help would be appreciated

I bought my 182 back in February and it's been fitted with a K&N air filter. However, my dad is a mechanic and has always told me to put the original Renault air filter/box back in as the performance will be better. We discussed some other options to get the best performance and BHP, but what...