Been looking at these myself,but due to going v8 will just hold off.As for what it will do well will make the sound a bit more raspy and as for performance wont really make any difference, due to being pre-cat on the manifold.
Hello jim here aka jamis,just got myself a is200 sport. Now I must say im loving the car and hope to keep her for a good few years. I do plan on a 4.0 v8 conversion from a ls400. Must say great site and any fello Scotsman here also??