When I got my GP bout 5 days ago it had a thrasher intake. With the WORLDS most dirty K&N filter. I need to replace it big time. My AMS oil rep Freaked out when i told him that i might just use his oil filter and oil. I told him that i was going to call thrasher and order the S&B Powerstack he bout fell over haha. Well what do you guys think? Had and experance with the filters by ams oil? Should i call trasher or walk into autozone and just by the K&N.? I was thinking about buying them all and making a hogepodge of all the filters?