Hi Yeah I would just go the 3a filter, as for zed workshops in Perth as stated try Tom at PZP (ZRATED) on this forum, good bloke and knows his stuff, bit far away though in Mindarie (other end of the world) His number is 0438 843 467. Hope this helps, Andy
Thnaks heaps Andy i went to see Tom and his gonna get me the filter. hahah his not that far, a street down from my work *sweeet* -Sam
Thas a lie...i had the apexi on my NA and it sounded crazy.... much tougher. the 3A's are rated best airflow etc but u have to replace them quite ofter the apexi is the longers lasting without maintanace