I just found this on ebay and was curious if anyone else has seen these or have tried it and maybe have a sound clip or video. I didn't think they made slip ons for this bike... Interesting and cheap.
09 15 Yamaha FZ6R Competition Werkes GP Slip on Exhaust Tip | eBay
09 15 Yamaha FZ6R Competition Werkes GP Slip on Exhaust Tip | eBay