I have the Mountune cat-back exhaust and the Milltek flexi pipe which had really made a BIG difference to my ST150, these now combined with the CAIS have transformed it in to the car it should be, it sounds fantastic too! The CAIS comes as a complete kit and was very easy to set up, the instructions are downloadable from this site. The quality Mountune badge on top was the perfect finishing touch.
Great induction noise and increase in pulling power. Nice looking filter and covering too.
More than happy