Eventually got to hear it, oh my god it sound AWESOME.
At some point once I have the car I want a sports cat and downside to the standard backbox
At first I was really dissapointed in the lack of noise, but as the miles are racking up its starting to sound abit better.
TMC sells both sport cats and slightly bigger bore centre pipes that are designed to tie up with the standard or monza back box. I know a few people that are real big fans of the factory back box, Lisa's gota sport cat and is still sporting the standard back box