I know this is an old thread but hoping someone else will chime in on the GPR's. I'm really interested in the Furores. I haven't seen any videos with some on a 919. Looking for dual set-up W/O the DB killers, I like noise! Really looking for a low end rumble and good loud note in the top end. Yoshi's are too quiet. Anyone else running these or have experience with this company? I've heard the finish wears off on some.