Hi guys, just a quick one; have a hif 44 carb on a 1300 metro engine, the cone filter on there at the moment is a bog standard one but will changing it to a pipercross (http://www.minisport...o_PCFC1504.html) make any noticeable difference (sound wise) or do you reckon all air filters are the same? Read on a blog some where it creates some serious noise but I beg to differ, cheers for your help.