I recently installed brocks ALIENHEAD exhaust and pc5. The first night I took it out after I put the map on the pc5 it was perfect. The next day when I took it out I noticed that when I'm about half throttle and I take it to upper rpms around 7-8k it stutters and sounds/feels like I just hit the rev limiter. This does not happen when I'm full throttle. The only thing that I did between those two days was take my battery out to test it then put it back in . It also doesn't feel as fast as it did the first night. If anyone has any ideas it would be greatly appreciated.
