I dont understand this at all, perhaps I'm missing something? How can that "wee bit of power" (in a response) which "however I am sure there isnt a difference in reality" be a "good mod"?
Lets say its 0.5HP, that equals ~3% more power...for the price of removing the cat, which 100% guaranteed removed the environment protecting effect, and in a few countries would make the bike illegal to boot. At least it was free haha.
Sounds like the worst mod I can think of. I must be missing something...