I had JDM make my chip more aggressive while at FFW and I put on the #4 today. Well my question is; does everyones rpms change at between 5000 and 5500 at WOT? I love the chip. Some reason when I had a differant chip in the chip felt rough or dirty ,the only way I can explain it. The JDM chip feels clean and smooth. Who knows whats that all about, but maybe its the air/fuel or the timing. But Me Likes!!!