Hi MS, i fitted one two months ago. I opted for the full black oval with diamond tip. It looks good and sounds good. Not too worried about extra HP, it is already way too fast, hahaha. On my GSA lc the exhaust bracket had to be altered slightly to make sure that the pannier arm would fit properly in its place. Also, slightly chowing my right rear indicator. Otherwise, VERY happy with the service, friendly and fast. Regards, Langasem