Just had mine fitted today, no way I would have done it myself, so had it done by Jamsport. Took about 3 hours for it to be done, wheather it's worth it (I had a 200 cell sports CAT fitted too) remains to be seen, first impessions are it's much smoother in delivering the power, as for gains I will have to get down to surrey rolling road to have a run that I can compaire to my prevous run down there.
How much does it cost?
If you can't notice the difference then it's not worth it.