Hello!
I recently decatted mine, and personally I didn't notice too much difference in the performance, just a lot more of a raspy noise (not that I am complaining, because it sounds awesome) .
You also may end up the the engine warning light on, but Im sure that's just because of the lamda sensors "freaking out" because of the unfiltered emissions.
Another thing is that fitting the decat itself is a bit of a pain in the ass! but not impossible
