You can do it in different ways, but it makes no sense to do one without the other on a 01 (Marelli) bike.
The gain from the free flowing intake is as much or more then the gain from the pipes, and the gain from both is a little more then the added gain from each individually.
These bikes need to be reflashed even just for pipes, but ideally you would use a Power Commander, either instead or in addition to the reflash. It makes no difference what pipes you go with (some make a little more power then others) but make up your mind and do it once, as the PC will possibly have to be remapped for each different pipe.
The difference on these bikes is noticeable if done right, much more so then on a 02 bike.
The gain from the free flowing intake is as much or more then the gain from the pipes, and the gain from both is a little more then the added gain from each individually.
These bikes need to be reflashed even just for pipes, but ideally you would use a Power Commander, either instead or in addition to the reflash. It makes no difference what pipes you go with (some make a little more power then others) but make up your mind and do it once, as the PC will possibly have to be remapped for each different pipe.
The difference on these bikes is noticeable if done right, much more so then on a 02 bike.