as it happens the changed sparkplugs gave it back the power it used to have so really i didnt notice , the power out put was the same when i put the filter in anyway lol it was just a way to justify the nismo badges on me car lol still got the nismo indicators tho , you would have to be silly to think that just a filter and k&n pipe would make any difference to a 1.0 micra lol it was just a novelty :laugh: