Hold on.
The stock UICP should be the first mod done to your X, it was for me at least. The interlaced fabric construction of the pipe, if you can call it that, can balloon under stock boost levels and thus should be changed immediately. I didn’t really notice a power difference once I installed my UICP but rather a power delivery difference. The power comes on alot smoother throughout the entire band now.
The LICP on the X is adequate and doesn’t need to be changed, It’s also a solid metal piece unlike the UICP.